Components of the Universe
Which two elements make up most of the mass of a star?
Fusion of hydrogen atoms together to make helium.
Which galaxies hold the old and dying stars and have little gas or dust with distinct edges?
Elliptical galaxies
All stars in the Universe formed at the same time when the Big Bang happened - true or false?
false
Most accepted theory for the formation of the universe
The big bang
What type of galaxy is just a smaller version of other galaxy types?
Dwarf
What do we call a large system of stars, planets, gas and dust?
A Galaxy
What are the four types of galaxies we learned about?
Spiral, elliptical, irregular, dwarf
organization that explores space
NASA
How many galaxies do they estimate exist in the universe?
2 trillion
What do we call a large cloud of gas and dust that will eventually create new stars?
A nebula
What happens to a star as it reaches the end of it's main sequence?
It expands into a red giant or red supergiant
What is Earth's only natural satellite?
The moon
What do we call the stuff that makes the universe expand?
Dark energy
What is a region in space called that's so dense not even light can escape it?
A black hole
If a galaxy has not defined shape it is...(these galaxies are often formed when galaxies merge)
irregular
What is the name of the explosion that happens with a high mass star?
Supernova
Where did our solar system come from?
A nebula
At Voyager 1's speed, how long would it take to go from one side of the Milky Way to the other
2 billion years
Put the components of the universe below from smallest to largest?
Solar systems, planets, universe, stars, galaxies
Planets, stars, solar systems, galaxies, universe
Our sun is a medium-low mass star, what will be it's life cycle from start to finish?
Nebulae-Main sequence- Red giant-White dwarf-Black Dwarf
Two pieces of evidence that support the big bang
1. Redshift
2. Cosmic background radiation
3. Universe ingredients
Which galaxy will our galaxy eventually merge with?
Andromeda