What is a galaxy?
We live on a planet considered Earth that is a piece of our nearby planetary group. Be that as it may, where is our close planetary system? It’s a little piece of the Milky Way Galaxy.
A galaxy is a colossal accumulation of gas, residue, and billions of stars and their heavenly bodies. A cosmic system is held together by gravity. Our world, the Milky Way, additionally has a too enormous dark gap in the center.
a graph that demonstrates that a planet is a piece of a close planetary system, and the nearby planetary group is a piece of a cosmic system
When you gaze toward stars in the night sky, you’re seeing different stars in the Milky Way. On the off chance that it’s extremely dim, far from lights from urban communities and houses, you can even observe the dusty groups of the Milky Way extend over the sky.
There are numerous systems other than our own, however. There are such a significant number of, we can’t check them all yet! The hubble space telescope took a gander at a little fix of room for 12 days and found 10,000 cosmic systems, everything being equal, shapes, and hues. A few researchers think there could be upwards of one hundred billion cosmic systems known to man.
A few systems are winding formed like our own. They have bended arms that make it resemble a pinwheel. Different worlds are smooth and oval formed. They’re called circular systems. What’s more, there are additionally systems that aren’t spirals or ovals. They have unpredictable shapes and look like masses. The light that we see from every one of these worlds originates from the stars inside it.
A chart of the diverse states of cosmic systems: winding, curved, and unpredictable.
Now and again systems get excessively close and crush into one another. Our Milky Way cosmic system will some time or another chance upon Andromeda, our nearest galactic neighbor. However, don’t stress. It won’t occur for around five billion years. Be that as it may, regardless of whether it happened tomorrow, you probably won’t take note. Universes are so enormous and spread out at the closures that despite the fact that cosmic systems chance upon one another, the planets and heavenly bodies regularly don’t draw near to impacting.