The sun
Galaxies
Gravity and force
Stars
Lives of stars
100
150,000,000 km
What is distance between Earth and the sun?
100
A huge group of stars, star systems, 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 an orbit?
100
A large, glowing ball of gas that generates energy through nuclear fusion.
What is a star?
100
It is formed in the most dense part of a nebula when gravity pulls gas and dust.
What is a protostar?
200
In our solar system it gives off tremenduous amounts of energy in the form of electromagnetic radiation.
What is the sun?
200
The spiral galaxy that contains the solar system and our planet.
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
It consists o f three layers: the photosphere, the chromosphere, and the corona.
What is the sun's atmosphere?
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 objcts 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
When low mass-stars and medium-mass stars like the sun, start to run out of fuel, they become red giants. When they have no more fuel , they begin to glow faintly from leftover energy. After billions of years they stop glowing.
What is a white dwarf?
400
This central region of the sun is where the nuclear fusion occurs.
What is the core?
400
An object whose gravity is so strong that nothing, no even light, can scape.
What is a black hole?
400
The measure of the force of gravity on an object.
What is weight?
400
The collision of two atoms of hydrogen producing one atom of helium and releasing a huge amount of electromagnetic energy.
What is nuclear fusion?
400
4.6 billion years old
What is sun's age?
500
8 minutes and 20 seconds.
How much time time does the sun's light take to reach our planet?
500
A galaxy shaped like a flat ball, that contains only old stars.
What is an 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?
500
This factor determines the life of the stars.
What is mass?
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