Gaia

The Solar System Might Not Exist if There Wasn’t a Huge Galactic Collision with the Milky Way Billions of Years Ago

The Milky Way has a number of satellite galaxies; nearly 60 of them, depedending on how we define them. One…

3 months ago

Tatooines everywhere? Many of the Exoplanets Already Discovered are in Multi-Star Systems

Right now, we know of about 4,000 confirmed exoplanets, mostly thanks to the Kepler mission. TESS, the Transiting Exoplanet Survey…

9 months ago

This Star has been Kicked Out of the Milky Way. It Knows What It Did.

Every once in a while, the Milky Way ejects a star. The evicted star is typically ejected from the chaotic…

1 year ago

Thanks to Gaia, We Now Know Exactly When We’ll be Colliding with Andromeda

Astronomers have known for some time that the Milky Way and the Andromeda galaxies will collide on some future date.…

1 year ago

Gaia Spots an Enormous Ghost Galaxy Right Next Door that’s Being Dismantled by the Milky Way

Astronomers combing through data from the ESA's Gaia spacecraft have discovered what they're calling a ghost galaxy. The galaxy, named…

2 years ago

The Milky Way is Still Rippling from a Galactic Collision Millions of Years Ago

Between 300 million and 900 million years ago, our Milky Way galaxy nearly collided with the Sagittarius dwarf galaxy. Data…

2 years ago

How Fast is the Universe Expanding? Hubble and Gaia Team Up to Conduct the Most Accurate Measurements to Date

A new study used data from both Hubble and Gaia in order to obtain the most precise measurements of cosmic…

2 years ago

Do Stars Move? Tracking Their Movements Across the Sky

The stars look static in the sky, but are they moving? How fast, and how do we know? What events…

3 years ago

Star-travel 5 Million Years Into The Milky Way’s Future

A new video based on ESA's Gaia Mission lets you gaze into the crystal ball and watch the Milky Way…

3 years ago

Astronomy Cast Ep. 365: Gaia

The European Gaia spacecraft launched about a year ago with the ambitious goal of mapping one billion years in the…

6 years ago