Related topics: stars · galaxies

Did we find exomoons or not?

Do exoplanets have exomoons? It would be extraordinary if they didn't, but as with all things, we don't know until we know. Astronomers thought they may have found exomoons several years ago around two exoplanets: Kepler-1625b ...

How NASA chases and investigates bright cosmic blips

Stephen Lesage's phone started vibrating just after halftime on Oct. 9, 2022, while he was watching a soccer game in Atlanta with a friend. When Lesage saw the incoming messages, the match no longer seemed important. There ...

Image: Hubble views a galactic supernova site

This image features a relatively small galaxy known as UGC 5189A, which is located about 150 million light-years away in the constellation Leo. This galaxy was observed by the NASA/ESA Hubble Space Telescope to study a supernova ...

Astronomers rule out one explanation for the Hubble tension

Perhaps the greatest and most frustrating mystery in cosmology is the Hubble tension problem. Put simply, all the observational evidence we have points to a universe that began in a hot, dense state, and then expanded at ...

Another example of a fantastic Einstein ring

The most evocative astronomy images take us across space and time to stars and galaxies billions of light-years away. Nestled at the center of this one, taken by the Hubble Space Telescope, is a collection of three galaxies. ...

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