Gaia

A team of US astronomers led by Kailash Sahu said they have finally discovered the first isolated stellar-mass black hole traveling through space by itself. The researchers...

When we see spiral galaxies, some are face-on, others are edge-on, but most are tipped at an angle. But which side is closest to us? Remarkably, just by a visual inspection, you can conclude — with…

After more than a decade of mapping the stars, the European spacecraft was shut down on Thursday. But its legacy lives on.

With contributions from NASA, the mission is looking back into the universe's history to understand how the universe's expansion has changed.

The Large Magellanic Cloud, a close neighbor to the Milky Way, may house a giant black hole. It's the closest supermassive black hole outside of our galaxy.

Astronomers have discovered what might be the speediest exoplanet system found so far. It moves at 1.2 million miles per hour (1.9 km per hour). The post Speediest exoplanet found near Milky Way center? first appeared on EarthSky.

And that's not all Gaia detected.

Built by MIT researchers, the Plasma Science Experiment aboard the Voyager 2 spacecraft took measurements for the last 47 years and 15 billion miles, before shutting down on Sept. 26.

Studies analyzing starlight patterns identified unusual radiation that could suggest the existence of Dyson Spheres, potentially pointing to alien civilizations.

MIT astronomers discovered three of the oldest stars in the universe, and they live in our own galactic neighborhood. The stars are in the Milky Way's "halo" — the cloud of stars that envelopes the entire main galactic disk — and they appear to have formed between 12 and 13 billion years ago, when the very first galaxies were taking shape.

For some reason, when we talk about the age of stars, galaxies, and the Universe, we use "years" to measure time. Can we do better?

May help explain why we see so many of these monsters colliding.

A black hole 33 times the mass of the sun is the largest stellar black hole ever spotted, and its strange companion star could help explain how it got so huge

The black hole is just 2,000 light-years away in the constellation Aquila

Regardless of what stock market analysts, political pollsters and astrologers might say, we can't predict the future. In fact, we can't even predict the past...

It takes two to tango, but in the case of brown dwarfs that were once paired as binary systems, that relationship doesn't last for very long, according to a recent survey from NASA's Hubble Space Telescope. Brown dwarfs are interstellar objects larger than Jupiter but smaller than the lowest-mass stars. They are born like stars […]

Scientists have discovered that some "dead" white dwarf stars hide a metaphorical fountain of youth beneath their skin that helps them delay their cooling...

Astronomers are gearing up for an unusual celestial event: an asteroid's occultation, or total covering, of an iconic star.

The Euclid team has released a spectacularly panoramic and detailed image of the Horsehead nebula.

A long-dead white dwarf star is running away from Hyades star cluster — and it could help astronomers solve a number of cosmic mysteries.