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Astronomy

Regents Review Cocepts

QuestionAnswer
How Does the Sun Produce Energy? nuclear fusion
During nucleosynthesis hydrogen atoms within the Sun collide and fuse together to form Helium
During nucleosynthesis within a massive star, Oxygen (O) atoms fuse together to form Silicon
explains the origin of the universe as an enormous explosion that occurred about 13.8 billion years ago. The Big Bnag Theory
Proves that distant galaxies appear to be moving away from us,stretching their light toward the red end of the spectrum. red-shift
A faint glow of radiation left over from the early universe. Cosmic background radiation
A cloud of gas and dust where stars form nebula
The longest stage in an average stars life cycle, where the stars burns off hydrogen. The Main Sequence
*The Star Group in which Vega, Sirius and our Sun are found The Main Sequence
*The spectral class of a star with a temperature of 4200 degrees K
A massive explosion which spreads heavier elements into space. Supernova
*the final stage in a Sun-like star's life cycle White Dwarf
Planets stay in orbit due to the balance between inertia and Gravity
The orbital velocity of an astronomical object is determined by the object mass and ____________________ from its primary. Distance
The degree or elongation within the orbital path of a planet or comet is known as Eccentricity of orbit
When a planet is at its closest approach to its primary it is said to be at ___________________________ Perihelion
When a planet is at its farthest approach to its primary it is said to be at ___________________________ Aphelion
As the distant between a planet and it perihelion decreases, its orbital velocity will____________________ Increase
Created by: ljasso
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