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Astronomy
| Term | Definition |
|---|---|
| Rotation | the action of rotating around an axis or center. |
| Revolution | he action by a celestial body of going round in an orbit or elliptical course |
| Most common elements in the universe | hydrogen and helium |
| Waxing | the moon at any time after new moon and before full moon, so called because its illuminated area is increasing. |
| Waning | when it is in the phase in which its visible surface area is getting smaller. A waning moon occurs between a full moon |
| Which side is the moon lit up on during the waxing phases? | the right side |
| Which side is it lit up on during the waning phases? | the left side |
| Whats the moon’s revolution period | 27 days |
| How long does it take for the moon to go from new moon to full moon? | 29.5 days |
| Witch planets are gas planets? | Jupiter, Neptune, Saturn, Uranus. |
| Witch planets are inner planets? | Mercury, Venus, Earth, Mars |
| Witch planets are outer planets? | Jupiter, Uranus, Saturn, Neptune |
| Aesteroid | a small rocky body orbiting the sun |
| Asteroid Belt | a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies |
| What direction does the tail of a comet point towards? | The tail always points away from the Sun |
| What causes the tail of a comet? | rock, metallic dust, and the frozen dust of volatile materials |
| Photosphere | the luminous envelope of a star from which its light and heat radiate |
| Corona | the outer atmosphere of the Sun |
| Solar Wind | the continuous flow of charged particles from the sun which permeates the solar system. |
| Sunspots | are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. |
| How does the sun generate energy | Nuclear Fusion |
| Absolute Magnitude | brightness of a celestial object as it would be seen at a standard distance of 10 parsecs. |
| Apparent Magnitude | the magnitude of a celestial object as it is actually measured from the earth. |
| 90% of the stars on an H-R diagram are ______________ ______________ stars. | Main Sequence |
| Nebula | a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter. |
| Main Sequence | 90% of stars in the solar system are at this point of their life |
| Red Giant | s a dying star in the last stages of stellar evolution. |
| Red Supergiant | the largest stars in the universe in terms of volume, |
| Supernova | a powerful and luminous stellar explosion. This transient astronomical event occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion. |
| Black Dwarf | a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently that it no longer emits significant heat or light. |
| Black Hole | a region of spacetime where gravity is so strong that nothing no particles or even electromagnetic radiation such as light |
| What causes stars to have different life cycles? | Its determined by its mass |
| A protostar must start what process to be considered a star? | Nuclear FusionThe |
| The galaxy we live in | The Milky Way |
| Oval shaped | Elliptical |
| Spiral | curve, shape, or pattern. |
| Irregular | not even or balanced in shape or arrangement. |
| Whats the center of a galaxy? | Black Hole |
Created by:
kaitlynraker
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