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58 Cards in this Set
- Front
- Back
Heliocentric |
When the sun is the center of solar system |
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Geocentric |
When the earth is at the center of our solar system |
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Spectroscopy |
Science of Colour |
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Bright Line Spectrum |
Gas is heated at low pressure, which goes through a prism and produces few colours and thick black lines(spectral) |
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Continously Spectrum |
Gas heated at a high presses or solid/liquid heated (no spectral lines, blended colours) |
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Absorption or Dark Line |
Gas heated at high pressure or heated solid/liquid(thin spectral lines) |
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Interferometry |
When you connect 2 radio telescopes to a computer to improve image quality |
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Diffraction Grating |
Device made of thousands of closely spaced slits, used to learn wavelengths or colour contained in a beam of light |
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Spectrums |
Emission, Continous, Absorption |
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Triangulation |
Way of indirectly measuring |
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Red Shift |
Object moves away from you |
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Earth Rotation Period |
24 hours |
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Resolving Power |
Depends on objective lens |
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Triangulation Measuring |
Needs a baseline and 2 angles |
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Longest wavelengths |
Come from Radio Telescope |
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Nebula |
Made of dust and gas |
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Furthest AU measurement on Earth |
2 AU |
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Azimuth |
Which compass direction it can be found in the sky |
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Zenith |
Directly up |
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Order of planets (Heliocentric) |
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune |
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Hottest Planet |
Venus, atmosphere acts as a cage/greenhouse gas effect |
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Saturn |
Prominent rings, second largest |
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Uranus |
Not visible by naked eye, orbits on its side, thing rings |
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Neptune |
Further from the sun, not visible by naked eye, thin rings |
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Mercury |
Smallest, closest to sun, most cratered, no moons |
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Venus |
Hottest Planet, thick atmosphere, close to earth's size, 2nd brightest object in the night sky |
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Mars |
"Red planet" due to iron oxide, 2nd smallest, signs of liquid water, polar ice caps |
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Jupiter |
Largest, thin rings, heaviest planet |
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Terrestrial Planets |
Inner planets, mercury, Venus, Earth, Mars |
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Gas Giants |
Outer Planets, Jupiter, Saturn, Uranus, Neptune |
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Doppler Effect |
Increase or decrease of sound ( closer more high pitched. ) |
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Galaxy |
Billions of stars combiner with gas and dust which is all held by gravitational attraction |
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Reflecting Telescope |
When a mirror is used to collect and focus light |
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Retracting Telescope |
Uses a lens as its objective to form an image . Also referred to as a dioptric telescope. |
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Lightyear |
Distance of what light can travel in a year |
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Altitude |
Height |
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Combination Telescope |
Makes distant objects appear larger and brighter by using a combination of lenses (refracting telescope) or lenses and curved mirrors (reflecting telescope |
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Adaptive Optics |
Technology used to improve the performance of optical systems by reducing the effect of wavefront distortions: it aims at correcting the deformations of an incoming wavefront by deforming a mirror in order to compensate for the distortion. |
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Space Telescopes |
Telescope operated in space, allows it to avoid light pollution |
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Electromagnetic Spectrum |
Range of wavelengths or frequencies over which electromagnetic radiation extends. |
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Sun |
Made of hydrogen ( mostly )and helium |
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Risks of Living In Space |
Oxygen, pressure, temperature, fuel, water storage, food, muscle loss |
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Natural Satellite vs Artificial Satellite |
Any celestial body that orbits around another body are natural (Ex. Moon) vs Man made rockets are artificial |
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Probe |
A spacecraft designed to transmit information about its environment |
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Shuttle |
Reusable spacecraft that is designed to launch satellites and transport people or materials between earth and a space station |
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Satellite |
Can be natural or artificial. Any celestial body that orbits another planet or man made object |
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Solar Eclipse |
Moon completely covers the suns disk. When moon passes between the sun and the earth, and the moon fully or partially blocks the sun. |
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Lunar Eclipse |
When moon passes directly behind the earth. When the sun, Earth and moon are alinged, exactly, or very close, with the earth in the middle. |
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Communication Satellites |
Are artificial and provide signals and recieve signals from Earth to the satellite in space |
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Geosynchronous Orbit |
Earth satellite that matches the rotation of earth. Approximately 23 h and 56 m and 4 s |
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Low Earth Orbit |
When earth is orbiting with an altitude between 160 km |
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Observation Satellite |
Designed for Earth observation, used for environmental monitoring, meteorology, map making etc |
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Remote Sensing |
Scanning of earth by satellite |
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Global Positioning System (GPS) |
System of satellite, computers and receivers that are able to determine latitude and longitude of a receiver on Earth by calculating time difference for signals from different satellites to reach the receiver |
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Rocket: Payload |
Can be a satellite, sauce probe or spacecraft carrying, humans, animals, or cargo |
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Rocket : Exhaust Velocity |
Exhaust has leaves the ozzie of the rockets engine |
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Rocket : Staged Rocket |
A multistage rocket is a rocket that uses 2 + stages, each one contains it's own engine and propellant |
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Rocket : Gravitational Assist |
A movement ( maneuver or swing ) which gravity of a planet or another astronomical object to alter the path and speed of a spacecraft |