The Sagittarius Dwarf Galaxy is a small satellite galaxy located near the constellation Sagittarius. It is currently in the process of merging with our Milky Way, making it one of the most studied examples of galactic interaction.
The galaxy lies approximately 70,000 light-years away from Earth, orbiting around the outer regions of the Milky Way.
The Milky Way’s powerful gravitational pull is drawing the Sagittarius Dwarf Galaxy inward, gradually tearing it apart and absorbing its stars. This cosmic event is known as galactic cannibalism.
Astronomers estimate that the Sagittarius Dwarf Galaxy has passed through the Milky Way roughly three times over the past six billion years.
Each time the Sagittarius Dwarf Galaxy collides with the Milky Way, it disturbs vast clouds of gas and dust, triggering the formation of new stars. These interactions help shape the structure and evolution of our galaxy.
Scientific studies suggest that our Sun may have formed during one of these galactic encounters, around 5.7 billion years ago, when star formation was stimulated by the dwarf galaxy’s passage.
The Sagittarius Stream is a long, arcing trail of stars that stretches across the sky. It consists of remnants of the dwarf galaxy being stripped away as it merges with the Milky Way’s gravitational field.
Over the next 700 to 800 million years, the Sagittarius Dwarf Galaxy will be completely assimilated into the Milky Way, its stars becoming part of our galaxy’s halo and outer disk.
“The universe grows not by peace, but by graceful collisions that create new worlds.”
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