Solar system

Question 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.

Answer 1

Nebula

Question 2

The solar nebula was the rotating, flattened disk of gas and dust from which the solar system originated

Answer 2

Solar Nebula

Question 3

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

Answer 3

Nuclear Fusion

Question 4

Sunspots are dark, planet-sized regions that appear on the “surface” of the Sun.

Answer 4

Sunspot

Question 5

The Terrestrial Planets. From top: Mercury, Venus, Earth, and Mars.

Answer 5

Terrestrial Planets

Question 6

Prograde refers to an object that spins in the same direction as its orbit.

Answer 6

Prograde Rotation

Question 7

Apparent retrograde motion is the apparent motion of a planet in a direction opposite to that of other bodies within its system, as observed from a particular vantage point.

Answer 7

Retrograde Rotation

Question 8

a large planet of relatively low density consisting predominantly of hydrogen and helium, such as Jupiter, Saturn, Uranus, or Neptune.

Answer 8

Gas Giant

Question 9

an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.

Answer 9

Satellite

Question 10

In astronomy, the new moon is the first lunar phase, when the Moon and Sun have the same ecliptic longitude.

Answer 10

New Moon

Question 11

The Waxing Crescent is an intermediate phase of the Moon, which starts after the New Moon and lasts until the First Quarter.

Answer 11

Waxing Crescent

Question 12

It’s the moon phase halfway between new moon and full moon.

Answer 12

1st Quarter Moon

Question 13

Waxing gibbous means it’s getting visually wider and wider from day to day, culminating in a full moon.

Answer 13

Waxing gibbous

Question 14

When the moon is fully shown.

Answer 14

Full Moon

Question 15

The Waning Gibbous is an intermediary Moon phase.

Answer 15

Waning Gibbous

Question 16

A last quarter moon appears half-lit by sunshine and half-immersed in its own shadow.

Answer 16

Last Quarter Moon

Question 17

The Waning Crescent phase occurs when the illumination of the Moon decreases from 49.9% to 0.1%.

Answer 17

Waning Crescent

Question 18

A solar eclipse occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight.

Answer 18

Solar Eclipse

Question 19

an eclipse in which the moon appears darkened as it passes into the earth’s shadow.

Answer 19

Lunar Eclipse

Question 20

a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.

Answer 20

comet

Question 21

A rock in space.

Answer 21

Asteroid

Question 22

The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars.

Answer 22

Asteroid Belt

Question 23

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

Answer 23

meteoroid

Question 24

A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon. … Once it settles on the larger body’s surface, the meteor becomes a meteorite.

Answer 24

Meteorite

Question 25

A meteoroid is a small rocky or metallic body in outer space.

Answer 25

Meteor