Articles on Astronomy

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Galaxy cluster MACS J1149.5+2223 taken with the Hubble Space Telescope. The inset image is the very distant galaxy MACS1149-JD1. ALMA (ESO/NAOJ/NRAO), NASA/ESA Hubble Space Telescope, W. Zheng (JHU), M. Postman (STScI), the CLASH Team, Hashimoto et al.

When did the lights first come on in the universe? A galaxy close to the dawn of time gives a clue

Astronomers have indirectly spotted some of the first stars in the universe by making their most distant detection of oxygen in a galaxy that existed just 500m years after the Big Bang.
Artist’s impression of Proxima b, a planet orbiting the star Proxima Centauri within the closest known star system outside of our solar system. (ESO/M. Kornmesser)

Can Artificial Intelligence help find alien intelligence?

Using AI to search for ET might help us find things we couldn't even imagine we should look for, but to succeed we also have think critically about how we create and use that technology.
Time to peer below the swirling clouds of Jupiter. NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill

The latest from Juno as Jupiter appears bright in the night sky

Now's a great time to see Jupiter as it's about to be the closest to Earth for some time. Time too to catch up with the latest on the Juno mission, exploring the largest planet in our Solar System.
Imagined view from Kepler-10b, a planet that orbits one of the 150,000 stars that the Kepler spacecraft is monitoring. NASA/Kepler Mission/Dana Berry

Goodbye Kepler, hello TESS: Passing the baton in the search for distant planets

When NASA first started planning the Kepler mission, no one knew if the universe held any planets outside our solar system. Thousands of exoplanets later, the search enters a new phase.
The ISS sees us on Earth, but look up at night and you may see it, too. NASA

Look up – it’s a satellite!

A couple thousand satellites are orbiting Earth right now. Under the right conditions, your naked eye can spot these human-made objects in the night sky.
An artist’s impression of the predicted merger between our Milky Way (right) and the neighboring Andromeda galaxy (left). So which galaxy will dominate? NASA; ESA; Z. Levay and R. van der Marel, STScI; T. Hallas; and A. Mellinger

When galaxies collide, size matters if you want to know the fate of our Milky Way

Bigger galaxies tend to dominate the smaller, when the two collide. But the pending battle between our Milky Way and the Andromeda galaxy might be a much fairer fight than we previously thought.

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