Space Topics 1-2

Question 1

Point of Reference

Answer 1

A set of axes (of any kind) that is used to describe the positions or motions of things.

Question 2

Celestial Bodies

Answer 2

Objects in the sky, such as the sun, moon,
stars, meteors and planets.

Question 3

Constellations

Answer 3

Groups of stars that resemble objects, animals or people in the night sky.

Question 4

Asterism

Answer 4

Groups of stars that are recognized in popular culture but are not recognized by the International Astronomical Union.

Question 5

Azimuth

Answer 5

The azimuth coordinate tells you which direction to face while looking at an object in the sky.

Question 6

Altitude

Answer 6

The altitude coordinate tells you how high the object is in the sky.

Question 7

Astrolabe

Answer 7

Any type of early scientific instrument used for reckoning time and for observational purposes.

Question 8

Geocentric

Answer 8

The idea that the Earth is at the centre of the universe and that all other objects revolve around Earth.

Question 9

Heliocentric

Answer 9

The idea that the sun was at the centre of the universe. The Earth, stars and other planets revolved around the sun.

Question 10

Optical Telescopes

Answer 10

Gather and focus more light into our eyes.

Question 11

Refracting Telescopes

Answer 11

A refracting telescope uses two convex glass
lenses to gather and focus light.

• The objective lens gathers light to create a
  brighter image.
• The eyepiece lens focuses the light into your eye
  to create a magnified image with more detail.

Question 12

Reflecting Telescopes

Answer 12

A reflecting telescope uses a concave mirror and a
convex lens to gather and focus light.

• The objective mirror gathers light to create a brighter
  image.
• The eyepiece lens focuses the light into your eye to
  create a magnified image with more detail.