Chap. 1-4

Question 1

Distance from Sun to Earth?

Answer 1

1 au

Question 2

Speed of light?

Answer 2

300,000,000 m/s

Question 3

What is gravity?

Answer 3

The force of attraction between two objects with mass

Question 4

What are atoms made of?

Answer 4

Protons, electrons, and neutrons

Question 5

How far across is the Milky Way?

Answer 5

100,000 ly

Question 6

How far away is Andromeda?

Answer 6

2,300,00 ly

Question 7

Shape of Andromeda/ relevance?

Answer 7

Spiral shape similar to what we think the Milky Way looks like

Question 8

Solstices?

Answer 8

Summer and Winter, the shortest and longest days of the year, because of rotation of Earth

Question 9

Equinoxes?

Answer 9

When day and night are of equal measure, due to the rotation of Earth

Question 10

Synodic cycle?

Answer 10

29.5 days; time to complete a full moon cycle

Question 11

Sidereal month?

Answer 11

27.3 days; time to fully orbit Earth

Question 12

Tilt of moon?

Answer 12

relative 5º

Question 13

Time spacing to observe parallax?

Answer 13

6 months (opposite orbits)

Question 14

North Celestial Pole?

Answer 14

Point in Northern Hemisphere where all stars seem to rotate, this is at Polaris (North Star)

Question 15

Kepler’s Three Laws?

Answer 15

Ellipses
Equal areas in equal time
T2=kA3

Question 16

Important properties of waves?

Answer 16

frequency

wavelength

Question 17

Wein’s Law?

Answer 17

Blue is hotter than red

Question 18

wavelengths of VIBGYOR

Answer 18

400-700 NM

Question 19

Evidence for Big Bang?

Answer 19

Doppler Effect of spectroscopy on distant things (shifted towards Red or Violet)