The Solar System

an object that orbits a star, is large enough to be rounded by its own gravity & cleared orbit

the outermost layer of the sun's interior

the inner layer of the sun's atmosphere

areas of gas on the sun's surface that are cooler than the gasses around them

Term describing a model of the universe. Earth is at the center of revolving planets & stars

chunks of rock and dust smaller than asteroids

An object that orbits the sun and is spherical, but has not cleared the area of orbit

a unit of distance egual to the average distance between Earth and the sun

Spherical region of comets that surrounds the solar system

streams of electrically charged particles 

inner planets are small and dense and have rocky surfaces

A model of the solar system in which Earth and the other planets revolve around the sun

rocky objects, most of which are too small and too numerous to be planets or dwarf planets

Middle layer of the sun's atmosphere.  This part is seen at the start and end of  total eclipse

the system consists of the sun and the planets and other objects that revolve around it

When energy heats gas on the sun to millions of degrees and the gas erupts into space

An oval shape, which may be elongated or nearly cicular; the shape of the planet's orbit

a region of the solar system between Mars and Jupiter

often link different parts of sunspot regions together

Hydrogen atoms join to helium atoms in this process

planets that are more massive and much larger than Earth and do not have solid surfaces

A region where many small objects orbit the sun and that stretches beyond Neptune

The central region of the sun

a thin disk of small particles of ice and rock 

loose collections of ice, dust, and small rocky particles. orbits can be long narrow ellipses

Meteoroids that pass through the atmosphere and land on Earth

one of the small asteroid-like bodies that formed the building blocks of the planets

when a meteoroid creates heat and light entering the Earth's atmosphere

trapping of heat by the atmosphere 

the outer layer of the sun's atmosphere.  looks like a white halo around the sun