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ESA

ISS radiators and solar arrays

Image taken by ESA astronaut Luca Parmitano from outside the International Space Station on the first spacewalk to service the cosmic ray detecting Alpha Magnetic Spectrometer (AMS-02). Luca and his spacewalking partner NASA astronaut Andrew Morgan performed the first of... Continue Reading →

Explaining the 'tiger stripes' of Saturn's moon Enceladus

Saturn's gravity exerts tidal forces on Enceladus, which cause heating and cooling of the tiny world. Those forces are strongest at the poles. As liquid water solidifies into ice under the outer ice shell, it expands in volume, putting pressure... Continue Reading →

Global geologic map of Titan

The first map of the global geology of Saturn's largest moon, Titan, has been completed, revealing a dynamic world with dunes, lakes, plains, craters and other terrains. The map is based on data from the international Cassini mission, which performed more than... Continue Reading →

SOLAR ORBITER’S JOURNEY AROUND THE SUN

Animation showing the trajectory of Solar Orbiter around the Sun, highlighting the gravity assist manoeuvres that will enable the spacecraft to change inclination to observe the Sun from different perspectives. During the initial cruise phase, which lasts until November 2021,... Continue Reading →

NGC 7714: Starburst after Galaxy Collision

Is this galaxy jumping through a giant ring of stars? Probably not. Although the precise dynamics behind the featured image is yet unclear, what is clear is that the pictured galaxy, NGC 7714, has been stretched and distorted by a recent collision with a... Continue Reading →

Unexpected periodic flares may shed light on black hole accretion

ESA’s X-ray space telescope XMM-Newton has detected never-before-seen periodic flares of X-ray radiation coming from a distant galaxy that could help explain some enigmatic behaviours of active black holes.  XMM-Newton, the most powerful X-ray observatory, discovered some mysterious flashes from... Continue Reading →

Spiral Disk around a Black Hole

What would it look like to orbit a black hole? Many black holes are surrounded by swirling pools of gas known as accretion disks. These disks can be extremely hot, and much of the orbiting gas will eventually fall through the black hole'sevent... Continue Reading →

Hubble’s Portrait of Star’s Gaseous Glow

Although it looks more like an entity seen through a microscope than a telescope, this rounded object, named NGC 2022, is certainly not algae or tiny, blobby jellyfish. Instead, it is a vast orb of gas in space, cast off... Continue Reading →

INSIDE AEOLUS

ESA’s Aeolus satellite, which carries the world’s first space Doppler wind lidar, has been delivering high-quality global measurements of Earth’s wind since it was launched almost a year ago. However, part of the instrument, the laser transmitter, has been slowly... Continue Reading →

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