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Astronomy.today compiles news, articles and information from thirty-three news sources on astronomy, astrobiology, space and planetary exploration, and other related topics, with an archive of more than 15,000 articles.

On our site, you will also find an online planetarium with the star catalog Hipparcos up to magnitude 8, as well as the deep sky brightest objects of Messier and Bennet catalog.

Today's latest news:

Week in images: 03-07 August 2020 Discover our week through the lens

A new study suggests that during Jupiter’s violent storms, hailstones form from a cooled mixture of water and ammonia gas, similar to the process in Earth’s storms where hail forms in the presence of supercooled liquid water; growth of these Jovian hailstones, dubbed ‘mushballs,’ creates a slush-like substance surrounded by a layer of ice, and [...]

This weekend sees the 45th anniversary of the launch of Cos-B, the first satellite to be launched under the banner of the newly created European Space Agency, on 9 August 1975.

Despite a nominal lifetime of two years, ESA’s Cluster is now entering its third decade in space. This unique four-spacecraft mission has been revealing the secrets of Earth’s magnetic environment since 2000 and, with 20 years of observations under its belt, is still enabling new discoveries as it explores our planet’s relationship with the Sun.

In two years’ time, the next Copernicus Sentinel-1 satellite will be launched to join its two siblings in orbit around Earth. With engineers busy building Sentinel-1C, they have recently tested the mechanism that opens its 12 m-long radar antenna.