New supercomputer simulations suggest the Milky Way could be surrounded by dozens more faint, undetected satellite ...

The Gaia mission of the European Space Agency (ESA) has officially ceased its scientific operations after 12 years of service. This spacecraft, dedicated to mapping the Milky Way, has exhausted its ...

Image: Halo stars: ESA/Gaia/DPAC, T Donlon et al. 2024; Background Milky Way and Magellanic Clouds: Stefan Payne-Wardenaar The region of interest in the Gaia data is the Milky Way’s inner ...

The European Space Agency's Milky Way-mapper Gaia has completed the sky-scanning phase of its mission, racking up more than 3 trillion observations of about 2 billion stars and other objects over ...

Comet 31/ATLAS is only the third interstellar object to ever be observed whizzing through the Solar System. While its origins ...

Gaia, Europe’s Milky Way–mapping spacecraft, shut down earlier this year. It was arguably the most important—and most overlooked—astronomy project of the 21st century.

A newly discovered interstellar comet could be older than the Solar System, and scientists think it carries secrets from the ...

A monster exoplanet as big as 10 times the size of Jupiter has emerged from the stellar gas and dust surrounding a young star ...

We are not alone—at least as a galaxy. About 50 dwarf galaxies surround the Milky Way.But when its intense gravity inevitably draws them to venture too close, they will probably be annihilated.

“Gaia is really giving us the toolkit to understand the Milky Way.” Gaia doesn’t only look at the composition of stars, though. It also looks at their temperature, mass, age, and motion.

Scientists have discovered an enormous stellar-mass black hole in our Milky Way galaxy that’s roughly 33 times more massive than our sun. This black hole designated as Gaia-BH3 was observed with ...

Gaia, Europe’s Milky Way–mapping spacecraft, shut down earlier this year. It was arguably the most important—and most overlooked—astronomy project of the 21st century. Lee Billings.