Astronomy

Question 1

What is a nebula?

Answer 1

A nebula is a cloud of gas and dust probably cast off from other stars that used to live in this region of our galaxy.

Question 2

How much does one parsec equal ?

Answer 2

3.62 light years

Question 3

What is an Astronomical unit ?

Answer 3

The average distance between sun and Earth

Question 4

What is a light year ?

Answer 4

The distance light goes in one year

Question 5

What does planetesimal mean ?

Answer 5

A minute planet; a planet that did or could coe together with many others under gravitation to form a planet.

Question 6

What is a terrestrial planet ?

Answer 6

A planet having a compact rocky surface like the Earth’s; the four most innermost planets in the solar system.

Question 7

What is an orbit ?

Answer 7

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

Question 8

What is the process called that releases energy when lightweight nucleai combine to form heavier nuclei?

Answer 8

Nuclear fusion

Question 9

What is the grouping of stars in the night sky that are in a recognizable pattern ?

Answer 9

Constellation

Question 10

What is another name for the outer solar system planets ?

Answer 10

Gas Giant Planets

Question 11

What are the outer solar system planets?

Answer 11

Jupiter, Saturn, Uranus, and Neptune.

Question 12

What are the Terrestrial Planets ?

Answer 12

Mercury, Venus, Earth or Mars.

Question 13

What do the Terrestial Planets mainly consist of ?

Answer 13

Rocky material

Question 14

What does a comet consist of ?

Answer 14

A nucleas, ice and dust.

Question 15

What does it mean to revolve ?

Answer 15

Move in a circular orbit around

Question 16

What is an asteroid ?

Answer 16

A small rocky body orbiting the sun.

Question 17

What is the job title of an astronomer who studies the evolution and space-time relations of the universe ?

Answer 17

A cosmologist

Question 18

What does protoplanterary mean ?

Answer 18

Protoplanterary are moon sized or larger planetary embryos within protoplanterary disc that have undergone internal melting to produce differentiated interior..

Question 19

How long is a Solar Day ?

Answer 19

The time between successive meridian transits of the sun at a particular place.

Question 20

What is a rotation ?

Answer 20

The action of rotating around an axis or center.

Question 21

What is angular velocity ?

Answer 21

The rate of change of angular position of a rotating body.

Question 22

How long is a sideral day ?

Answer 22

Equal to 23 hours 56 minutes and 4 seconds in units of mean solar time.

Question 23

What is a year ?

Answer 23

A period of time duing which the earth completes a single revolution around the sun.