Space

Question 1

Orbit

Answer 1

the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution

Question 2

Solar system

Answer 2

the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets

Question 3

Galaxy

Answer 3

a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.

Question 4

Universe

Answer 4

all existing matter and space considered as a whole; the cosmos. The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies; it has been expanding since its creation in the Big Bang about 13 billion years ago

Question 5

Satellite

Answer 5

A satellite is an object in space that orbits or circles around a bigger object

Question 6

Impact Crater

Answer 6

An impact crater is an approximately circular depression in the surface of a planet, moon, or other solid body in the Solar System or elsewhere, formed by the hypervelocity impact of a smaller body

Question 7

Rotation

Answer 7

the action of rotating around an axis or center

Question 8

Revolution

Answer 8

an instance of revolving.

Question 9

Season

Answer 9

each of the four divisions of the year (spring, summer, autumn, and winter) marked by particular weather patterns and daylight hours, resulting from the earth’s changing position with regard to the sun

Question 10

Equinox

Answer 10

the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of equal length (about September 22 and March 20

Question 11

Solstice

Answer 11

either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days

Question 12

Mare

Answer 12

The lunar Maria

Question 13

Eclipse

Answer 13

an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination

Question 14

Umbra,

Answer 14

the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse

Question 15

Penumbra,

Answer 15

the partially shaded outer region of the shadow cast by an opaque object.

Question 16

Astronomical Unit (AU),

Answer 16

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 17

Ellipse,

Answer 17

a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant, or resulting when a cone is cut by an oblique plane that does not intersect the base

Question 18

Terrestrial Planet,

Answer 18

A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals. Within the Solar System, the terrestrial planets are the inner planets closest to the Sun, Mercury, Venus, Earth, and Mars

Question 19

Gas Giant,

Answer 19

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

Question 20

Asteroid,

Answer 20

a small rocky body orbiting the sun

Question 21

Comet,

Answer 21

A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing

Question 22

Meteor,

Answer 22

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

Question 23

Meteorite,

Answer 23

a meteor that survives its passage through the earth’s atmosphere such that part of it strikes the ground

Question 24

Geocentric,

Answer 24

having or representing the earth as the center, as in former astronomical systems

Question 25

Gravity,

Answer 25

L

Question 26

Tide,

Answer 26

P

Question 27

Waxing,

Answer 27

cover or treat (something) with wax or a similar substance, typically to polish or protect it

Question 28

Wannig,

Answer 28

of the moon) have a progressively smaller part of its visible surface illuminated, so that it appears to decrease in size

Question 29

Gibbous Moon,

Answer 29

Any moon that appears more than half lighted but less than full is called a gibbous moon

Question 30

Crescent Moon,

Answer 30

A crescent shape is a symbol or emblem used to represent the lunar phase in the first quarter, or by extension a symbol representing the Moon itself

Question 31

Full Moon,

Answer 31

the phase of the moon in which its whole disk is illuminated

Question 32

New Moon,

Answer 32

the phase of the moon when it is in conjunction with the sun and invisible from earth, or shortly thereafter when it appears as a slender crescent

Question 33

Quarter Moon

Answer 33

Occurs when the moon’s illumination is increasing, First Quarter. The moon is one-half illuminated by the sun. Occurs when the moon’s illumination is increasing, Waxing Gibbous

Question 34

Heliocentric,

Answer 34

W