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ESPS - O'Connor
O'Connor - ESPS Astronomy
| Question | Answer |
|---|---|
| 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. |
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EgoO'Connor
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