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Astronomy(universe)

TermDefinition
Big Bang theory A greatly accepted theory on how the Earth was formed.
The Doppler Shift towards the red end of the spectrum is evidence of what? That the universe is expanding.
Solar Nebular theory Theory on how stars and solar system form.
How do all stars start off? As a solar nebula that eventually collapses.
How do stars form? They form by condensation and gravitational compression of the nebula.
Solar Nebula Huge, vast clouds of ice, gas, and dust.
What is a star's lifespan? Does the star change? The lifespan is infinite; star evolves over time.
What controls a stars lifespan, ultimate fate, and how it evolves. Its weight
What is the order of less massive stars? Nebula, protostar, main sequence star(born), white dwarf, and the black dwarf (death).
List the order of massive stars. Nebula, main sequence star (born), supernova, and neutron star (death)
Define galaxies. Collection of billions of stars.
List the types of galaxies. The spiral, elliptical, and irregular.
What galaxy is our solar system located in? The Milky Way
Define black holes. The end of the life cycle of some super giant (massive) stars usually after the supernova stage post a supernova explosion.
How do black holes in the middle of the galaxy effect other stars. They allow the stars to gain velocity so they can orbit around the black hole rather than get sucked into the center.
The ground-based information we get about the universe by satellites gather what type of information? Electromagnetic radiation ( infrared, ultraviolet, and X- rays)
Light- year Distance light travels in one year
What is measured in light years? Distances in the universe
Blue giant Star that put a lot of energy out and lasts only hundreds to millions of years
When are heavier elements above iron produced? When the Blue Giant becomes a supernova.
Russel (H-R) A diagram that shows the relationship between absolute magnitude in relation to their surface temperatures.
Created by: Zhundley99
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