Astronomy

Question 1

What is an astronomical unit?

Answer 1

It is the approximate distance to the sun from earth.

Question 2

Explain what a light year is?

Answer 2

A light year is how far light travels in a time of one year.

Question 3

What is equivalent to a parsec?

Answer 3

3.26 light years.

Question 4

What does this picture show?

Answer 4

This picture shows interstellar clouds with dust and gas, whis is a nebula.

Question 5

What is a constellation?

Answer 5

It is a recognizable pattern of stars.

Question 6

What is the definition of planetesimal?

Answer 6

It is small bodies which formed from the solar nebula, which eventually grew into a protoplanet.

Question 7

What is the meaning of protoplanetary?

Answer 7

Clumps of material, formed in early stages of solar system formation, which is a forerunner of planers we see today.

Question 8

What is nuclear fusion?

Answer 8

Nuclear fusion is when two or more atomic nuclei fuse together to make a heavier one.

Question 9

What are terrestrial planets?

Answer 9

They are planets mainly made of rocky material.

Question 10

What is the definition of gas giant planets?

Answer 10

They are planets composed mainly of hydrogen, helium and methane.

Question 11

What is a comet?

Answer 11

A chunk of ice that orbits the sun.

Question 12

What is an asteroid?

Answer 12

A planet body larger than a meteor that orbits the sun.

Question 13

What is a cosmologist?

Answer 13

A cosmologist is someone who studies the origin and dunamics of the universe.

Question 14

What is the definition of angular velocity?

Answer 14

It is the rate at which a body rotates or revolves.

Question 15

What is the defintion of orbit?

Answer 15

It is a path of a body takes around another body in space.

Question 16

What is a period?

Answer 16

It is the time it takes for an object to complete one full orbit.

Question 17

What is the definition for revolve?

Answer 17

It is to move around another object.

Question 18

Whats the definition for rotation?

Answer 18

Moving around an axis of something.

Question 19

What is the definition for sidereal?

Answer 19

It is the period of time it takes for a planet to complete one full rotation.

Question 20

What is the definition of a solar day?

Answer 20

It is the time required for a planet (celestial body) to return the same place relative to the sun.

Question 21

What is the scientific definition of a year?

Answer 21

It is the period it takes to complete one full revolution around the sun.

Question 22

What is the definition of accretion?

Answer 22

Growth in size of something such as the water level.

Question 23

What is Spring Tide?

Answer 23

Spring tide is when the moon is directly across from the sun and it cause the tide accretions to vary greatly.

Question 24

Neap tide is….

(fill in the blank)

Answer 24

Neap tide is when the moon is at a right angle from the sun, and the tide accretions vary very little.

Question 25

What is eccentricity?

Answer 25

The distance between two vertices in a graph (the number of the shortest path connecting them)

Question 26

What is a coma?

Answer 26

a diffuse cloud of gas surronding the nucleus of a comet

Question 27

What is precession?

Answer 27

a slow movement of an spinning body on an axis around another axis due to a torque

Question 28

Define orbital plane

Answer 28

the plane on which a body is orbitting

Question 29

What is a inclination

Answer 29

A slope or slant on a graph