Sad 3

Question 1

Orbit

Answer 1

1.

the curved path of a celestial object or spacecraft around a star, planet, or moon,

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

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

Question 6

Impact Crater

Answer 6

a crater on a planet or moon caused by the impact of a meteorite or other object, typically circular with a raised rim.

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

he lunar maria /ˈmɑːriə/ (singular: mare /ˈmɑːreɪ/) are large, dark, basaltic plains on Earth’s Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for “seas”, by early astronomers who mistook them for actual seas.

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.
“an eclipse of the sun”

Question 14

Umbra

Answer 14

the dark central part of a sunspot.

Question 15

Penumbra

Answer 15

the shadow cast by the earth or moon over an area experiencing a partial eclipse.

Question 16

Astronomical Unit (AU

Answer 16

(AU) represents the mean distance between the Earth and our sun.

Question 17

Ellipse

Answer 17

The orbit of each planet is an ellipse with the Sun at one focus. An ellipse is defined as the locus of all points such that the sum of the distances from two foci to any point on the ellipse is a constant.

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, i.e. 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. Large numbers of these, 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 21

Comet

Answer 21

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.

Question 22

Meteor

Answer 22

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.

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

measured from or considered in relation to the center of the earth.

Question 25

Heliocentric

Answer 25

measured from or considered in relation to the center of the sun.

Question 26

Gravity

Answer 26

the force that attracts a body toward the center of the earth, or toward any other physical body having mass.

Question 27

Tide

Answer 27

the alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun.

Question 28

Waxing

Answer 28

waxing or waning Gibbous moon, which means more than half of the moon is illuminated

Question 29

Waning

Answer 29

Waning Moon means the moon is decreasing in size, moving from the Full Moon towards the New Moon.

Question 30

Gibbous Moon

Answer 30

in between a half-moon but less than a full moon.

Question 31

Crescent Moon

Answer 31

A crescent is a thin, curved shaped moon that's thicker in the middle and tapers to thin points at each end.

Question 32

Full moon

Answer 32

the time when the moon's whole disk is illuminated.

Question 33

New Moon

Answer 33

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 34

Quarter Moon

Answer 34

The moon is one-half illuminated by the sun. Occurs when the moon's illumination is decreasing, Waning Crescent. The moon is less than one-half illuminated by the sun but less than one quarter illuminated.

Question 35

Perihelion

Answer 35

the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun

Question 36

Aphelion

Answer 36

the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun.