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Solar System

Terms

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Orbit
Path followed by an object moving under control of another objects gravity force.
Black hole.
A massive object so dence that no light can escape it.
Protostar
Regions of dense matter that may contrast forming spiining balls of gas and dust that form the early life of a star.
AU
The distance from earth to the sun.
Spiral glaxy
a galxy that looks like a pinwheel. Arms of gas and dust.Our galaxy is this.
Local group
Group of more than 2 dozen galaxies.
Irregular galaxy
No regular pattern. Least common.
Neutron star
A star mostly made of neutrons. Dense spins fast...Like speed racer.
Absolute magnitude
A mesure of a stars true brightness.
Galaxy
A bunch of starts, gas, and dust.Held together by gravity.
Terrestrial planets
The inner rockey planets. Mercury, Venus, Earth, and Mars.
Elliptical galxy
A galaxy shaped like a football. Most common.
White dwarf
A small hot white star found in th lower left of the HR diagram.
Fusion
The combining of Hydrogen atoms into helium atoms: the main source of energy from a star.
Satellite
A small objectthat orbits a larger one.
Solar system
Stars planets commets and everything else around the sun.
Star
Shines. Self-luminous.
Constellation
A grouping of stars named by astronaomers based on the shape and grouping.
Gaseous giants
Large gas planets in out solar system. Jupitar, Saturn, Uranus, and Neptune.
Supernova
The violent explosion of a large star that ends its life.
Light year
Distance light can travel in a year.
Nebula
Large cloud of dust and gas gravitational forceon each other causing the cloud to contract and temperature to rise causing fusion.
Milky way
Our galaxy.
Apparent brightness
The brightness of a star as it appears from earth.
Red giant
A cool but large red star found in the upper right corner of the HR diagram.
Planet
A non luminus object illuminated by light from a star. Such as our sun around which this revolves.

Deck Info

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