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ESA

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@europeanspaceagency

We definitely put a ring on it❗️⠀
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Saturn hosts many recognisable features, most notably its trademark ring system, which is now tilted towards Earth. This gives us a magnificent view of its bright icy structure. Hubble resolves numerous ringlets and the fainter inner rings. Dutch astronomer Christiaan Huygens first identified the rings in 1655 and thought they were a continuous disk encircling the planet, but we now know them to be composed of orbiting particles of ice and dust. Though all of the gas giants boast rings, Saturn's are the largest and most spectacular.

The age of Saturn's ring system continues to be debated. And, even more perplexingly, it's unknown what cosmic event formed the rings. There is no consensus among planetary astronomers today.
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Go to our @instagram Story to learn more about this image.⠀⠀⠀
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📸 @NASA, @europeanspaceagency, A. Simon (@nasagoddard), and M.H. Wong (@ucberkeleyofficial); @creativecommons CC BY 4.0
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We definitely put a ring on it❗️⠀
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Saturn hosts many recognisable features, most notably its trademark ring system, which is now tilted towards Earth. This gives us a magnificent view of its bright icy structure. Hubble resolves numerous ringlets and the fainter inner rings. Dutch astronomer Christiaan Huygens first identified the rings in 1655 and thought they were a continuous disk encircling the planet, but we now know them to be composed of orbiting particles of ice and dust. Though all of the gas giants boast rings, Saturn's are the largest and most spectacular.

The age of Saturn's ring system continues to be debated. And, even more perplexingly, it's unknown what cosmic event formed the rings. There is no consensus among planetary astronomers today.
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Go to our @instagram Story to learn more about this image.⠀⠀⠀
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📸 @NASA, @europeanspaceagency, A. Simon (@nasagoddard), and M.H. Wong (@ucberkeleyofficial); @creativecommons CC BY 4.0
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8796 0 2 hours ago
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@europeanspaceagency

Friedrichshafen

Sentinel-6 is ready for testing‼️ 🌊🛰
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Dedicated to measuring changes in global sea level, the @copernicus_eu Sentinel-6A satellite is now equipped with some of its measuring instruments and ready to be tested in preparation for liftoff at the end of next year.
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Engineers at @Airbus in Friedrichshafen, Germany, have spent the last months fitting out the satellite with state-of-the-art sensors to measure the changing height of the sea surface.
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And, since the Copernicus Sentinel-6 mission is a two-satellite constellation they have been working on both Sentinel-6A and Sentinel-6B. The two identical satellites will be launched sequentially, starting with Copernicus Sentinel-6A in November 2020.
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Go to our @instagram Story to learn more.
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📸 @airbus_space / L. Engelhardt
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Sentinel-6 is ready for testing‼️ 🌊🛰
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Dedicated to measuring changes in global sea level, the @copernicus_eu Sentinel-6A satellite is now equipped with some of its measuring instruments and ready to be tested in preparation for liftoff at the end of next year.
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Engineers at @Airbus in Friedrichshafen, Germany, have spent the last months fitting out the satellite with state-of-the-art sensors to measure the changing height of the sea surface.
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And, since the Copernicus Sentinel-6 mission is a two-satellite constellation they have been working on both Sentinel-6A and  Sentinel-6B. The two identical satellites will be launched sequentially, starting with Copernicus Sentinel-6A in November 2020.
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Go to our @instagram Story to learn more.
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📸 @airbus_space / L. Engelhardt
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8179 0 8 hours ago
@europeanspaceagency Profile picture

@europeanspaceagency

Four hours in 40 seconds‼️ ⏱
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In this timelapse you can see how our astronaut Luca Parmitano is dismantling a microscope in the Japanese Kibo module on the @iss during his Beyond mission.
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The microscope was used for @jaxajp experiment Space Moss that looks at how microgravity affects the growth, development, gene expression, photosynthetic activity, and other features of moss. Results could help researchers develop a new strain suited for growth on the space station, future space missions, and bases on the Moon or Mars.
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Go to our @instagram Story to learn more about the science aboard the Space Station.
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📹 @europeanspaceagency / @NASA
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Four hours in 40 seconds‼️ ⏱
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In this timelapse you can see how our astronaut Luca Parmitano is dismantling a microscope in the Japanese Kibo module on the @iss during his Beyond mission.
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The microscope was used for @jaxajp experiment Space Moss that looks at how microgravity affects the growth, development, gene expression, photosynthetic activity, and other features of moss. Results could help researchers develop a new strain suited for growth on the space station, future space missions, and bases on the Moon or Mars.
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Go to our @instagram Story to learn more about the science aboard the Space Station.
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📹 @europeanspaceagency / @NASA
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8269 0 19 September, 2019
@europeanspaceagency Profile picture

@europeanspaceagency

Slovenia

Look at those underground wonders‼️
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Astronauts from five space agencies around the world take part in our CAVES training course – Cooperative Adventure for Valuing and Exercising human behaviour and performance Skills.

The three-week course prepares astronauts to work safely and effectively in multicultural teams in an environment where safety is critical.

As they explore caves they encounter caverns, underground lakes and strange microscopic life. They test new technology and conduct science – just as if they were living on the International Space Station.

The six cavenauts of this edition of CAVES are our astronaut @astro_alex_esa, @NASA astronauts Joe Acaba and Jeanette Epps, @roscosmosofficial’ cosmonaut @spacelegion, @canadianspaceagency astronaut @astro_kutryk and @jaxajp Takuya Onishi.
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Go to our @instagram Story to learn more.
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📸 @europeanspaceagency@alessioromeo71

Look at those underground wonders‼️
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Astronauts from five space agencies around the world take part in our CAVES training course – Cooperative Adventure for Valuing and Exercising human behaviour and performance Skills.

The three-week course prepares astronauts to work safely and effectively in multicultural teams in an environment where safety is critical.

As they explore caves they encounter caverns, underground lakes and strange microscopic life. They test new technology and conduct science – just as if they were living on the International Space Station.

The six cavenauts of this edition of CAVES are our astronaut @astro_alex_esa, @NASA astronauts Joe Acaba and Jeanette Epps, @roscosmosofficial’ cosmonaut @spacelegion, @canadianspaceagency astronaut @astro_kutryk and @jaxajp Takuya Onishi.
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Go to our @instagram Story to learn more.
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📸 @europeanspaceagency – @alessioromeo71
13462 0 18 September, 2019
@europeanspaceagency Profile picture

@europeanspaceagency

🎶 Martian nights, 'neath Martian moons...🎶
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This captivating image was taken in the north polar region of Mars by the ESA/Roscosmos ExoMars Trace Gas Orbiter’s CaSSIS camera.
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Dunes come in various characteristic shapes on Mars just as on Earth, providing clues about the prevailing wind direction. Monitoring them over time also gives us a natural laboratory to study how dunes evolve, and how sediments in general are transported around the planet.
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During winter in the polar regions, a thin layer of carbon dioxide ice covers the surface and then sublimates – turns directly from ice into vapour – with the first light of spring. In the dune fields, this springtime defrosting occurs from the bottom up, trapping gas between the ice and the sand. As the ice cracks, this gas is released violently and carries sand with it, forming the dark patches and streaks observed in this CaSSIS image.
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The image also captures ‘barchan’ dunes – the crescent or U-shaped dunes seen in the right of the image – as they join and merge into barchanoid ridges. The curved tips of the barchan dunes point downwind. The transition from barchan to barchanoid dunes tells us that secondary winds also play a role in shaping the dune field.
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Go to our @instagram Story to see more striking images of our cosmic neighbour.
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📸 @europeanspaceagency / @roscosmosofficial / @unibe_cassis, @creativecommons CC BY-SA 3.0 IGO
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🎶 Martian nights, 'neath Martian moons...🎶
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This captivating image was taken in the north polar region of Mars by the ESA/Roscosmos ExoMars Trace Gas Orbiter’s CaSSIS camera.
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Dunes come in various characteristic shapes on Mars just as on Earth, providing clues about the prevailing wind direction. Monitoring them over time also gives us a natural laboratory to study how dunes evolve, and how sediments in general are transported around the planet.
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During winter in the polar regions, a thin layer of carbon dioxide ice covers the surface and then sublimates – turns directly from ice into vapour – with the first light of spring. In the dune fields, this springtime defrosting occurs from the bottom up, trapping gas between the ice and the sand. As the ice cracks, this gas is released violently and carries sand with it, forming the dark patches and streaks observed in this CaSSIS image.
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The image also captures ‘barchan’ dunes – the crescent or U-shaped dunes seen in the right of the image – as they join and merge into barchanoid ridges. The curved tips of the barchan dunes point downwind. The transition from barchan to barchanoid dunes tells us that secondary winds also play a role in shaping the dune field.
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Go to our @instagram Story to see more striking images of our cosmic neighbour.
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📸 @europeanspaceagency / @roscosmosofficial / @unibe_cassis, @creativecommons CC BY-SA 3.0 IGO
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16785 0 17 September, 2019
@europeanspaceagency Profile picture

@europeanspaceagency

The truth is out there... ☄️
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Astronomers have spotted an object that looks likely to be a very rare visitor from outside our Solar System. If confirmed, this unusual body would be only the second interstellar object ever detected passing through our neighbourhood.
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Like the fascinating cigar-shaped ʻOumuamua, which flew by in 2017, this bright object is also a comet, yet it cuts a very different shape in the sky.
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The new object, dubbed C/2019 Q4 (Borisov), was first detected on 30 August by amateur astronomer Gennady Borisov.
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Go to our @instagram Story to learn more.
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📹 2019 G. Borisov
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The truth is out there... ☄️
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Astronomers have spotted an object that looks likely to be a very rare visitor from outside our Solar System. If confirmed, this unusual body would be only the second interstellar object ever detected passing through our neighbourhood.
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Like the fascinating cigar-shaped ʻOumuamua, which flew by in 2017, this bright object is also a comet, yet it cuts a very different shape in the sky.
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The new object, dubbed C/2019 Q4 (Borisov), was first detected on 30 August by amateur astronomer Gennady Borisov.
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Go to our @instagram Story to learn more.
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📹 2019 G. Borisov
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21179 0 16 September, 2019
@europeanspaceagency Profile picture

@europeanspaceagency

Hubble Time! 🌌⠀⠀
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UGC 695 is a low-surface-brightness (LSB) galaxy. These galaxies are so faint that their brightness is less than the background brightness of Earth’s atmosphere, which makes them tricky to observe. This low brightness is the result of the relatively small number of stars within them — most of the baryonic matter in these galaxies exists in the form of huge clouds of gas and dust. The stars are also distributed over a relatively large area.
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LSB galaxies, like dwarf galaxies, have a high fraction of dark matter relative to the number of stars they contain. Astronomers still debate about how LSB galaxies formed in the first place.
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Go to our @instagram Story to learn more about this image.⠀⠀⠀
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📸 @europeanspaceagency/@hubbleesa & @NASA, D. Calzetti; @creativecommons CC BY 4.0
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Hubble Time! 🌌⠀⠀
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UGC 695 is a low-surface-brightness (LSB) galaxy. These galaxies are so faint that their brightness is less than the background brightness of Earth’s atmosphere, which makes them tricky to observe. This low brightness is the result of the relatively small number of stars within them — most of the baryonic matter in these galaxies exists in the form of huge clouds of gas and dust. The stars are also distributed over a relatively large area.
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LSB galaxies, like dwarf galaxies, have a high fraction of dark matter relative to the number of stars they contain. Astronomers still debate about how LSB galaxies formed in the first place.
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Go to our @instagram Story to learn more about this image.⠀⠀⠀
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📸 @europeanspaceagency/@hubbleesa & @NASA, D. Calzetti; @creativecommons CC BY 4.0
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22111 0 15 September, 2019
@europeanspaceagency Profile picture

@europeanspaceagency

Will we learn more with Cheops⁉️ 🤩
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With data from the NASA/ESA Hubble Space Telescope, water vapour has been detected in the atmosphere of a super-Earth within the habitable zone by @ucl researchers in a world first. K2-18b, which is eight times the mass of Earth, is now the only planet orbiting a star outside the Solar System, or exoplanet, known to have both water and temperatures that could support life.
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Go to our @instagram Story to learn more.
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🖥 @europeanspaceagency /@hubbleesa, M. Kornmesser; @creativecommons CC BY 4.0
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Will we learn more with Cheops⁉️ 🤩
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With data from the NASA/ESA Hubble Space Telescope, water vapour has been detected in the atmosphere of a super-Earth within the habitable zone by @ucl researchers in a world first. K2-18b, which is eight times the mass of Earth, is now the only planet orbiting a star outside the Solar System, or exoplanet, known to have both water and temperatures that could support life.
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Go to our @instagram Story to learn more.
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🖥  @europeanspaceagency /@hubbleesa, M. Kornmesser; @creativecommons CC BY 4.0
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37905 0 15 September, 2019
@europeanspaceagency Profile picture

@europeanspaceagency

Slovenia

We are going down‼️
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Six astronauts, five space agencies and a fresh start into underground worlds to help prepare for living on other planets. Our latest training adventure will equip an international crew with skills to explore uncharted terrains on the Moon and Mars, this time with a focus on the search for water.
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The CAVES training course takes astronauts to the depths of Earth to improve their communication, problem-solving and teamwork skills. ⠀⠀⠀
The six cavenauts of this edition of CAVES are our astronaut @astro_alex_esa, @NASA astronauts Joe Acaba and Jeanette Epps, @roscosmosofficial’ cosmonaut @spacelegion, @canadianspaceagency astronaut @astro_kutryk and @jaxajp Takuya Onishi.
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Go to our @instagram Story to learn more.
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📸 @europeanspaceagency@alessioromeo71

We are going down‼️
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Six astronauts, five space agencies and a fresh start into underground worlds to help prepare for living on other planets. Our latest training adventure will equip an international crew with skills to explore uncharted terrains on the Moon and Mars, this time with a focus on the search for water.
⠀⠀⠀
The CAVES training course takes astronauts to the depths of Earth to improve their communication, problem-solving and teamwork skills. ⠀⠀⠀
The six cavenauts of this edition of CAVES are our astronaut @astro_alex_esa, @NASA astronauts Joe Acaba and Jeanette Epps, @roscosmosofficial’ cosmonaut @spacelegion, @canadianspaceagency astronaut @astro_kutryk and @jaxajp Takuya Onishi.
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Go to our @instagram Story to learn more.
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📸 @europeanspaceagency – @alessioromeo71
16595 0 15 September, 2019
@europeanspaceagency Profile picture

@europeanspaceagency

Strait of Gibraltar

Almost there 👉 💧 👈
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This tiny strip water captured by Luca Parmitano from the @iss, is all that separates the African continent from the Eurasian one.
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When Luca posted this image of the Strait of Gibraltar on his Twitter account, he said: "Where two continents, two histories, meet and currents play with water and air creating pictograms of clouds and sea."
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📸 @europeanspaceagency / @NASA - L.Parmitano ⠀⠀⠀
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Almost there 👉 💧 👈
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This tiny strip water captured by Luca Parmitano from the @iss, is all that separates the African continent from the Eurasian one.
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When Luca posted this image of the Strait of Gibraltar on his Twitter account, he said: "Where two continents, two histories, meet and currents play with water and air creating pictograms of clouds and sea."
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📸 @europeanspaceagency / @NASA - L.Parmitano ⠀⠀⠀
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21228 0 14 September, 2019
@europeanspaceagency Profile picture

@europeanspaceagency

It's time for the #ESAquiz! 🔎⠀⠀⠀⠀⠀⠀
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Do you know the name and location of this planet in the Solar System?⠀⠀⠀⠀
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Write your answers in the comment section 👇 and stay tuned to our @instagram Story for the answer and a shout out!⠀
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📸 @NASA/ @johnshopkinsu Applied Physics Laboratory/ @carnegiescience

It's time for the #ESAquiz! 🔎⠀⠀⠀⠀⠀⠀
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Do you know the name and location of this planet in the Solar System?⠀⠀⠀⠀
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Write your answers in the comment section 👇 and stay tuned to our @instagram Story for the answer and a shout out!⠀
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📸  @NASA/ @johnshopkinsu Applied Physics Laboratory/ @carnegiescience
19115 0 14 September, 2019
@europeanspaceagency Profile picture

@europeanspaceagency

Mexicali, Baja California

All these trippy colours have a meaning!
#Repost @esa_earth
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Today, the Copernicus Sentinel-1 mission takes us just south of the US border, to the region of Baja California in northwest Mexico. Its capital city, Mexicali, is visible top left of the image.

This false colour image contains three separate images overlaid on top of each other. Captured on 30 April, 12 May and 17 June, the different colours represent changes that occurred on the ground.

The Colorado River, which forms the border between Baja California and Sonora, can be seen cutting through the rich and colourful patchwork of agricultural land at the top right of the image, before it fans out and splits into multiple streams. 📸 contains modified @copernicus_eu Sentinel data (2019), processed by @europeanspaceagency

All these trippy colours have a meaning! 
#Repost @esa_earth
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Today, the Copernicus Sentinel-1 mission takes us just south of the US border, to the region of Baja California in northwest Mexico. Its capital city, Mexicali, is visible top left of the image.

This false colour image contains three separate images overlaid on top of each other. Captured on 30 April, 12 May and 17 June, the different colours represent changes that occurred on the ground.

The Colorado River, which forms the border between Baja California and Sonora, can be seen cutting through the rich and colourful patchwork of agricultural land at the top right of the image, before it fans out and splits into multiple streams. 📸 contains modified @copernicus_eu Sentinel data (2019), processed by @europeanspaceagency
13412 0 14 September, 2019