Astrophysics

Question 1

What is the sun

Answer 1

Star

Question 2

what is a moon

Answer 2

rocky body that orbits a planet

Question 3

elliptical orbit

Answer 3

Orbit path that is not circular, but shaped as an ellips

Question 4

Is the sun at the centre of elliptical orbit?

Answer 4

No, except when the orbit is approximately circular

Question 5

Gravitational field of a planet depends on?

Answer 5

Mass of planet

Question 6

Planets field strength decreases as

Answer 6

Distance from planet increases

Question 7

Speed of light?

Answer 7

3 x 10 to the power 8

Question 8

Time light takes to reach earth

Answer 8

8 minutes

Question 9

why do planets orbit the sun

Answer 9

It has a great gravitational pull as it has the most mass in the solar system.

Question 10

what keeps and object in orbit

Answer 10

Gravitational pull from the sun

Question 11

How long does it take the moon to orbit the Earth?

Answer 11

28 days

Question 12

How much is the earth tilted on its axis?

Answer 12

23.5 degrees

Question 13

How do the seasons work?

Answer 13

Since the earth is tilted, one hemisphere will be closer to the sun and the other will be further. SO one will have summer and theother will have winter

Question 14

Sun made of

Answer 14

Hydrogen and Helium

Question 15

Radiation from sun

Answer 15

Infrared, visible, ultraviolet

Question 16

Color of stars meaning

Answer 16

Blue = hot
red = cool

Question 17

where do nuclear reactions take place in stares

Answer 17

centre / core