It has no solid surface. About three quarters of its mass is hydrogen, and about one quarter is helium. It has an interior and atmosphere. The interior includes the core, the radiation zone, and the convection zone.
What is the sun?
100
a huge group of stars, star system, star clusters, dust, and gas bound together by gravity.
What is a galaxy?
100
Path of an object as it revolves around another object in space.
What is a orbit?
100
A large, glowing ball of gas that generates energy through nuclear fusion.
What is star?
100
Is formed when in the denset part of a nebula, gravity pulls gas an dust.
What is a protostar?
200
The process in which two atoms of hydrogen collide and produce an atom of helium releaising huge amount ofenergy. The process which by energy is produce in stars like the sun.
What is nuclear fusion?
200
The spiral galaxy that contains our solar system.
What is Milky Way?
200
Two factors which combine keep Erath in orbit around the sun.
What are inertia and gravity.
200
The diagram shows the relationship between surface temperature and absolute brightness of stars.
What is Hertzsprung-Ruseel diagram (HR).
200
When a supergiant star runs out of fuel and then explodes, within hours, the star blazes millions of times brighter.
What is a supernova?
300
150,000,000 km.
What is the distance between Earth and the Sun?
300
A large cloud of gas and dust spread over a large volume of space.
What is a nebula?
300
The force of atraction betweeen two objects which depends on their masses an the disatnce between them.
What is gravity?
300
Is a device that breaks light into colors and produces an image of the resulting spectrum
What is a spectrograph?
300
Low mass-stars and medium-mass stars like the sun. As they start to run out of fuel, they become red giants. When they have no fuel, they begin to glow faintly from leftover energy. After billions of years they stop glowing.
What is a white dwarf?
400
The sun does not have a solid surface, but the gases of this layer of the sun's atmosphere are thick enough to be visible.It is considered to be the sun's surface layer.
What is photosphere?
400
An object whose gravity is so strong that nothing, no even light, can scape?
What is black hole?
400
The measure of the force of gravity on an object.
What is weight?
400
Due to nuclear fusion the stars release electromagnetic waves. One form of electromagnetic waves that is visible releasing by stars travels at the speed of 300,000 k/s.
What is the speed of light?
400
4.6 billion years old
What is sun's age?
500
A stream of electrically charged particles that emanete from the sun's corona.
What is solar wind?
500
a galaxy shaped like a round of flattened ball, generaly containing only old stars.
What is ellipticall galaxy?
500
The tendency of an object to resist a change in motion.
What is inertia?
500
Hydrogen
What is the must abundant element in the universe?