Galaxy
The Earth centered model of the solar system
What is geocentric?
Eruptions of gas into space
What is a solar flare?
The inner layer of the sun’s atmosphere
What is the photosphere?
Round, orbits the sun, and has cleared the path of its orbit
What are planets?
Region of the solar system beyond Neptune’s orbit
What is the Kuiper Belt?
Dark areas on the sun’s surface
What is a sunspot?
An oval shape
What is an ellipse?
Thin disk of small particles of ice and rock
What is a ring?
Trapping of heat by the atmosphere
An object that orbits the sun and has enough gravity to be spherical, but has not cleared the area of its orbit
What are dwarf planets?
Consists of the sun, the planets, their moons, and a variety of smaller objects
What is the solar system?
Huge loops of gas linking different parts of sunspot regions
What is prominence?
Planets with high density, rich in rock and metallic materials, having a solid surface
What is a terrestial planet?
Stream of electrically charged particles
What is solar wind?
The outermost layer of the sun’s interior
What is the convection zone?
The middle layer of the sun’s atmosphere
What is the chromosphere?
A region of very tightly packed gas where energy moves mainly in the form of electromagnetic radiation
What is the radiation zone?
(AU) equals the average distance between the Earth and sun
What are astronomical units?
The sun centered model of the solar system
What is heliocentric?
Central region of the sun
What is the core?
Small bodies of ice and rock formed as gravity pulled them together
What is planetesimal?
The outer layer of the sun’s atmosphere
What is the corona?
The process in which hydrogen atoms join to form helium
What is nuclear fusion?
Planets larger than Earth that do not have solid surfaces
What are gas giants?
Region of the solar system between Mars and Jupiter
What is the asteroid belt?