What elements are found in young/new stars?
H and He
What is the heaviest element produced through fusion in stars?
Fe - Iron
What force brings gas and dust together to form Nebulas.
Gravity
State 3 characteristics that determine the brightness of a star?
Size, Temperature, Distance from Earth
Why do we see stars as they were in the past?
Takes so long for their light to reach Earth.
Star Catalina is a "cooler star" but is very bright. What can you infer about Star Catalina?
It is very big.
Fusion hasn't begun. Does not emit light.
List the 3 types of galaxies
Spiral, Elliptical, Irregular
What process occurs at the core of a star?
Nuclear Fusion
What is a nebula?
a cloud of gas and dust
What structure begins to form at the center of a Nebula in the life of a star.
Protostar
What is a galaxy?
A collection of millions to billions of stars held together by gravity
What is a neutron star?
Remains of high mass star after supernova.
The sun is approximately how old?
4.6 billion yrs
Stars take 1 of 2 pathways in their life cycle. What determines their pathway?
Mass of star
What is the Spanish or French word for star?
estrella
étoile
How are elements heavier than iron formed?
Through supernova explosions.
What is the distance of a light year?
9.5 x 1012 km
What is a light year?
The distance light travels in one year.
The Corona is the outer layer of the Sun. What is it's temperature?
1-2 million oC
Name the closest star to Earth, after the Sun.
Proxima Centauri or Alpha C
What is a white dwarf?
Leftover core from a red giant, results from a low mass star.
State 2 pieces of evidence that support the Big Bang Theory
Universe is expanding
Cosmic background radiation