Chapter 1 Review

Question 1

What is the definition of a Geocentric Universe?

Answer 1

That the Earth was set to be in the middle of the universe.

Question 2

What is the definition of a Heliocentric model?

Answer 2

A sun centered system.

Question 3

What was Copernican revolution?

Answer 3

Realized that the Earth is not central.

Question 4

What is rotation?

Answer 4

Turning of the Earth on its axis.

Question 5

How long is one rotation?

Answer 5

Its approximately 24 hours.

Question 6

The time it takes to go from noon to noon (24 hours)

Answer 6

Mean Solarday

Question 7

The time of one full rotation (360)

Answer 7

Sidereal Day.

Question 8

What is Revolution?

Answer 8

The orbit of Earth around the sun.

Question 9

The apparent backwards motion of the planets against background stars.

Answer 9

Retrograde motion.

Question 10

Length of the wave from crest to crest.

Answer 10

Wavelength

Question 11

What are Photons?

Answer 11

They are particles stream out from light called.

Question 12

What does the protons pressure make?

Answer 12

Comet’s tail

Question 13

The amount to which radiation is blocked by our atmosphere.

Answer 13

Opacity

Question 14

What is the definition of blackbody?

Answer 14

Objects that absorb and re-emit all its energy.

Question 15

What is Wien’s Law?

Answer 15

The hotter the object the shorter the wavelength.

Question 16

Refracting telescopes have a focusing problem called?

Answer 16

Chromatic color aberration

Question 17

Reflecting telescopes design

Answer 17

Viewing occurs at the focal point

Question 18

Finer detailed the image.

Answer 18

Resolution.

Question 19

Where are telescopes placed?

Answer 19

At a higher altitude

Question 20

What are active optics?

Answer 20

Controls the environmental and mechanical fluctuations in the telescope

Question 21

What are adaptive optics?

Answer 21

Adjusts the mirror to correct for atmospheric distortion

Question 22

North point.

Answer 22

0 azimuth

Question 23

East point.

Answer 23

90 azimuth

Question 24

South Point.

Answer 24

180 azimuth

Question 25

West Point.

Answer 25

270 azimuth