Learn English: The Milky Way's Last Galactic Dance Party (hard)
2 months, 4 weeks ago
The Milky Way galaxy we live in has grown by colliding with other galaxies.
New evidence shows that the last big party was more recent than we thought.
The Milky Way's last big merger was like a giant game of cosmic bumper cars, wrinkling up its stars.
The latest data suggests the Milky Way had a close encounter about 3 billion years ago.
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