Saturday, May 15, 2010

Antimatter

Antimatter are particles that have the opposite charge of matter particles. An example is a proton, which has a positive charge. An antiproton has a negative charge.

Thursday, May 6, 2010

Jupiter - facts 5

Jupiter would have to be 50 to 100 times bigger in order to become a star.

Planets - facts 11

Jupiter, Saturn, Uranus, and Neptune all have planetary rings.

Jupiter - facts 4

Jupiter is named after the supreme Roman god of the sky.

Venus - facts 6

After the Sun and Moon, Venus is the third brightest object in the sky.

Venus - facts 5

Venus is named after the Roman goddess of love.

Sun - trivia 6

1) How much total mass does the Sun make up in the Solar System?

a) 99%
b) 10%
c) 50%

Check comments for the answer.

Sun - trivia 5

1) What will the Sun eventually become?

a) a black hole
b) a red giant
c) a supernova

Check comments for the answer.

Jupiter - trivia 2

1) What is the Great Red Spot?

a) sand
b) a giant storm
c) giant rocks

Check comments for the answer.

Planets - trivia 13

1) What is a gas giant?

a) a very large solid planet
b) a solid planet
c) a planet that has no solid surface

Check comments for the answer.

Mars - facts 8

The surface of Mars is covered with sand and dust.

Mars - facts 7

It is believed that Mars once had a lot of water on its surface.

Particle physics

Particle physics is a branch of physics that deals with subatomic particles. An example are quarks and leptons and their interactions between them.

Astrophysics

Astrophysics is the study of the physics of celestial bodies. Stars, galaxies, and planets in the Universe.

Physics

Physics is the study of matter, energy, and its motion.

Astronomy

Astronomy is the study of celestial bodies. Examples are planets, moons, stars, and galaxies.

Cosmology

Cosmology is the study of the structure of the entire Universe.

Multiverse

A multiverse means more than one Universe. Besides our Universe, others may or may not exist.

Meteorite

A meteorite is a rocky like object that survives passage through the Earth's atmosphere and impacts with the Earth's surface.

Meteoroid

A meteoroid is a very small sand size to larger rock sized celestial bodies in interplanetary space. Meteoroids are smaller than asteroids.

Comet

A comet is a generally small celestial body made up of ice, rock, and dust. A comet tail is seen when a comet passes close to the Sun.

Asteroid

An asteroid is a rocky celestial body that orbits around the Sun. They are smaller than planets. In the Solar System, the asteroid belt is located between Mars and Jupiter.

Planetary nebula

Planetary nebula are the gaseous outer layers of a star that have been ejected into space from a star later in its life. This happens as a star forms into a white dwarf.

Star

A star is a massive celestial body made up of gas and plasma that is held together by gravity. Stars shine because of nuclear fusion.

White dwarf

A white dwarf is a small star (its mass is not high enough to become a neutron star) that has exhausted all of its nuclear fuel.

Red giant

A red giant is a very bright giant star in its late phase of evolution, when no hydrogen remains in the core and thermonuclear fusion of hydrogen happens in a shell surrounding the core. A red giant is yellow-orange to red in color.

Gamma-ray burst

Gamma-ray burst are released from supernovae and hypernovae. Gamma-ray bursts are the brightest events in the Universe.

Gas giant

A gas giant is a planet that has no solid surface.

Black hole

A black hole is an area in space that has extreme high gravity. Nothing can escape a black hole, including light.

Hypernova

Hypernovae are produced from the largest dying stars in the Universe. A hypernova is larger than a supernova.

Supernova

A supernova occurs when a giant star explodes. It is a giant burst of extremely bright light. They are more energetic than a nova.

Black dwarf

A black dwarf is when a white dwarf cools enough that it no longer emits much heat or light. Since the Universe is approximately 13.7 billion years, no black dwarfs are thought to exist yet, since white dwarfs can still emit heat.

Sun - facts 8

The Sun was formed from a giant nebula cloud.

Hypernovae - facts 1

Hypernovae are produced from the largest dying stars in the Universe. A hypernova is larger than a supernova.

Sun - facts 7

The Sun is not large enough to explode as a supernova or hypernova.

Stars - facts 3

Not all dying stars will become a supernova or hypernova.

Supernovae - facts 1

A supernova occurs when a giant star explodes. It is a giant burst of extremely bright light. They are more energetic than a nova.

Galaxies - facts 6

A supermassive black hole may lie at the center of the Milky Way galaxy.

Globular cluster

A globular cluster is many stars in one area that are tightly bound by gravity.