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Uses powers of 10 to write very large numbers or very small numbers in a shorter form.
An object that orbits a star, is large enough to have become rounded by its own gravity and has cleared the area of its orbit.
the system composed of the sun (a star) and the planets and other bodies that travel around the sun
large group of stars, dust, and gas held together by gravity; can be elliptical, spiral, or irregular
A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern.
a galaxy shaped like a round or flattened ball, generally containing only old stars
Law of Universal Gravitation
the scientific law that states that every object in the universe attracts every other object
Newtons first law of motion
an object in motion will remain in motion unless acted upon by another force
The process of building something up gradually by the gathering together of smaller pieces.
an instrument that separates light into colors and makes an image of the resulting spectrum.
a graph relating the surface temperatures and absolute brightness of stars
the blue-white hot core of a star that is left behind after its outer layers have expanded and drifted out into space.
the process in which two atomic nuclei combine to form a larger nucleus, forming a heavier element and releasing huge amounts of energy.
a region of very tightly packed gas where energy is transferred mainly in the form of electromagnetic radiation.
An eruption of gas from the sun's surface that occurs when the loops in sunspot regions suddenly connect.
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