Astronomy Ch.1

Question 1

Astronomy

Answer 1

The study of the univurse

Question 2

Year

Answer 2

The time required for the Earth to orbit once around the sun

Question 3

Month

Answer 3

A division of the year that is based on the orbit of the moon around the Earth

Question 4

Day

Answer 4

The time required for Earth to rotate once on its axis

Question 5

telescope

Answer 5

an instrument that collects electromagnetic radiation from the sky and concentrates it for better observations

Question 6

refracting telescope

Answer 6

a telescope that uses a set of lenses to gather and focus light from distant objects

Question 7

reflecting telescope

Answer 7

a telescope that uses curved mirror to gather and focus light from distant objects

Question 8

electromagnetic spectrum

Answer 8

all of the frequencies or wavelengths of electromagnetic radiation

Question 9

constellation

Answer 9

a region of the sky that contains a recognizable star pattern and that is used to describe the location of objects in space

Question 10

zenith

Answer 10

the point in the sky directly above an observer on Earth

Question 11

altitude

Answer 11

the angle between an object in the sky and the horizon

Question 12

horizon

Answer 12

the line where the sky and Earth appear to meet

Question 13

light-year

Answer 13

the distance that light travels in one year; about 9.46 trillion kilometers