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Question 1

Nebula

Answer 1

a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.

Question 2

Solar Nebula

Answer 2

A nebula cloud that formed our entire galaxy

Question 3

Nuclear Fusion

Answer 3

a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.

Question 4

Sunspot

Answer 4

a spot or patch appearing from time to time on the sun’s surface, appearing dark by contrast with its surroundings.

Question 5

Astronomical Unit

Answer 5

a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.

Question 6

Terrestrial Planets

Answer 6

A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals

Question 7

Prograde Rotation

Answer 7

Having a rotational or orbital movement that is the same as most bodies within a celestial system

Question 8

Retrograde Rotation

Answer 8

counterclockwise when viewed from above the Sun’s north pole

Question 9

Gas Giant

Answer 9

A large planet made from assorted gases

Question 10

Satellite

Answer 10

a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as Earth’s Moon- Moons are satellites

Question 11

Phase

Answer 11

any of the varying appearances of a celestial body as different amounts of its disk are seen

Question 12

Eclipse

Answer 12

obscure the light from or to another celestial body

Question 13

Comet

Answer 13

an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing. This produces a visible atmosphere or coma, and sometimes also a tail

Question 14

ASteroid

Answer 14

a small rocky body orbiting the sun. Large numbers of these, ranging in size from nearly 600 miles (1,000 km) across (Ceres) to dust particles, are found (as the asteroid belt ) especially between the orbits of Mars and Jupiter, though some have more eccentric orbits, and a few pass close to the earth or enter the atmosphere as meteors.

Question 15

Asteroid Belt

Answer 15

A region of the solar system between the orbits of the planets Mars and Jupiter

Question 16

Meteoroid

Answer 16

a small body moving in the solar system that would become a meteor if it entered the earth’s atmosphere.

Question 17

Meteorite

Answer 17

a meteor that survives its passage through the earth’s atmosphere such that part of it strikes the ground. More than 90 percent of meteorites are of rock, while the remainder consist wholly or partly of iron and nickel.

Question 18

Meteor

Answer 18

a small body of matter from outer space that enters the earth’s atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.