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ESPS - O'Connor

O'Connor - ESPS Astronomy

The early universe was primarily made up of what elements? Helium and Hydrogen
What is the ratio of hydrogen to helium in the early universe? Hydrogen made up approximately 73% of the early universe while Helium made up 25%. The other 2% were the other elements.
What does the process of nuclear fusion release? Nuclear fusion releases energy
Describe what kind of star creates a supernova explosion? Red giants and red supergiants.
How does a star's mass and elements change over it’s lifetime? The mass becomes greater and the elements become heavier.
What does an H-R diagram represent? The luminosity against their surface temperature or their color against their absolute magnitude.
What does analyzing the light that a star emits tell a scientist? The luminosity and the elements that the star is composed of.
What color are the hottest stars? The hottest stars are blue.
What is the difference between absolute magnitude and apparent magnitude? Absolute magnitude is how bright something actually is and apparent magnitude is how bright something appears from Earth.
In a main sequence star what fuses together? Helium and hydrogen nuclei.
What color are the coolest stars? The coolest stars are red.
What is a Nebula? A cloud of dust and/or gas in outer space.
What is a Neutron Star? The collapsed core of a giant star that had between 10-29 masses.
What is a Black Hole? A part of space that has such a great gravitational pull that nothing can escape it, not even light.
What is a Supernova? A star that's brightness suddenly gets bigger and then loses all fo it's matter.
What is a Protostar? A contracting mass made up of gas that's in the early stage of becoming a star.
What's a White Dwarf? A small extremely dense star that is normally the size of a planet.
What is a Red Giant? A very large star that's extremely bright but has very low surface temperature.
In the equation E=mc^2 what does E stand for? E stands for energy.
In the equation E=mc^2 what does m stand for? m stands for mass.
In the equation E=mc^2 what does c stand for? c stands for the speed of light in a vacuum.
Created by: EgoO'Connor