More galaxies (100 billion of them).
A galaxy orbiting outside spiral galaxy
The Andromeda Galaxy.
Our galaxy and the Milky Way are the same galaxy.
because nobody has ever been outside our galaxy so we can't tell if it is a spiral galaxy or not.
No. "Universe". We can see things outside our galaxy.
No. Nothing man-made has left our galaxy.
Yes, stars can exist outside of a galaxy. These stars are typically referred to as intergalactic stars, and they may have been ejected from their original galaxy due to interactions with other stars or galactic dynamics. Intergalactic stars are typically found in the space between galaxies.
Yes, with the help of powerful telescopes, scientists can observe and study objects outside of our galaxy, such as other galaxies, stars, and nebulae.
Yes, scientists know what is outside the Milky Way Galaxy. We know that the Andromeda galaxy is outside the Milky Way. The Andromeda is 300 million light years away from earth, and we have also mapped several stars, too.
Extragalactic
Yes.
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