galaxies
An elliptical galaxy is a type of galaxy characterized by its smooth, oval shape and lack of prominent spiral arms.
a super bright, compact region at the center of a galaxy, powered by a supermassive black hole
The galaxy is
A galaxy is a massive, gravitationally bound system of stars, gas, dust, and dark matter, typically containing billions of stars
what is the observable universe
what we can see in our universe
spiral galaxy is
A spiral galaxy is a type of galaxy characterized by a flattened, rotating disk with luminous spiral arms that curve outward from a central bulge.
Explain the Big Bang
the universe began as an infinitely small, hot, and dense point, which rapidly expanded and continued to stretch over 13.7 billion years. This initial period of rapid inflation set the stage for the vast and still-growing cosmos we observe today.
what is ordinary matter
The building blocks of the universe
what is irregular galaxy
Irregular galaxies are galaxies that don't fit into the standard classifications of spiral or elliptical galaxies
what is dark energy
mysterious force or energy that's causing the universe to expand at an accelerating rate. It's like an invisible push that's making everything in space move apart faster than it otherwise would
he expansion of the universe, the existence of the cosmic microwave background radiation, and the abundance of light elements in the universe
what is a starburst galaxy
a galaxy undergoing an exceptionally high rate of star formation, often much higher than typical galaxies
how are galaxies grouped into clusters and super clusters
Galaxies are grouped into clusters and superclusters due to gravitational attraction
what is the local group
a gravitationally bound collection of approximately 50 galaxies, including our own Milky Way
What is dark matter
Dark matter is an invisible substance that makes up a large portion of the universe's mass and gravity, but it doesn't interact with light, making it difficult to detect directly
what is our galaxy called
why do galaxy have large star formation
Galaxies have large star formations due to a combination of factors including gravitational collapse of vast gas and dust clouds, galaxy mergers, and internal feedback mechanisms within galaxies
what is the local supercluster
a gravitationally bound collection of approximately 50 galaxies, including our own Milky Way
Evidence of dark matter
The primary evidence for dark matter comes from its gravitational effects on visible matter, particularly within galaxies and galaxy clusters. These effects include the shape of galaxy rotation curves, gravitational lensing, and the distribution of hot gas in clusters. While dark matter is not directly visible, its gravitational influence is detectable
what is a characteristic of a starburst galaxy
lots of forming stars