Newly discovered galaxy mirrors Milky Way's early days

Sometimes in astronomy, a simple question has a difficult answer. One such question is this: what is the mass of our galaxy?
"Our reconstruction shows that clumps of actively forming stars are surrounded by diffuse light from other unresolved stars," ...
A black hole is a region in space where gravity is so strong that nothing—not even light—can escape from it. At the center of ...
Firefly Sparkle is still in the process of assembling and has a mass equivalent to about 10 million solar masses.
The Firefly Sparkle galaxy is so named because it resembles a "sparkle" or swarm of lightning bugs on a warm summer night.
This galaxy, which is stretched and magnified, glitters with 10 distinct star clusters that formed at different times.
NASA astronauts on the ISS share images of our home galaxy, the Milky Way. It can be hard to see from Earth, but the view ...
We know that interstellar objects occasionally visit our solar system. So far, we have only discovered two interstellar ...