P1 – The Expanding Universe: Answers

P1 – The Expanding Universe:  Answers

1.    Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, (Pluto).

2.    An asteroid belt.

3.    Solar system, Milky Way, Universe.

4.    It’s expanding.

5.    With a ‘Big Bang’.

6.    When light has been shifted towards the red end of the spectrum (making the wavelengths appear longer) because the source is moving away from us.

7.    When light has been shifted towards the blue end of the spectrum (making the wavelengths appear shorter) because the source is moving towards us.

8.   …