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Week in images: 18 - 22 January 2021

Discover our week through the lens

Iodine thruster could slow space junk accumulation

Iodine thruster used to change the orbit of a small satellite for the first time ever

For the first time ever, a telecommunications satellite has used an iodine propellant to change its orbit around Earth.

The small but potentially disruptive innovation could help to clear the skies of space junk, by enabling tiny satellites to self-destruct cheaply and easily at the end of their missions, by steering themselves into the atmosphere where they would burn up.

Sardinia, Italy

Image: Sardinia, the second-largest island in the Mediterranean Sea, is featured in this false-colour image captured by the Copernicus Sentinel-2 mission.

Earth from Space: Sardinia

Video: 00:03:23

This week's edition of the Earth from Space programme features a Copernicus Sentinel-2 image of Sardinia, the second-largest island in the Mediterranean Sea.

See also Sardinia, Italy to download the image.

Recycling Cassiopeia A

Massive stars in our Milky Way Galaxy live spectacular lives.