Celestial Sphere

Based off of the equatorial coordinate system, what is measured in units of time

• Latitude

• Declination

• Distance

• Right ascension

Based off the equatorial coordinate system, what is measured in degrees?

• Right Ascension

• Distance

• Weight

• Declination

Which star is found near 2hr, +40 degrees?

• G

• C

• D

• E

What is the approximate coordinates for star G?

​ (a)   hours, ​ (b)   degrees

• 3

• -40

• 4

• 5

• 40

• -30

How much of the celestial sphere can an observer on Earth see at one time?

• less than half

• exactly half

• more than half

Name the point directly above an observers head

• North Celestial Pole

• Nadir

• Zenith

• Polaris

What is the celestial equator?

• A band of constellations through which the planets and sun appear to move.

• The line that the sun traces across the celestial sphere.

• An imaginary line in the sky directly above Earth's equator.

• An imaginary line running north-south through the zenith

If an astronomer informs you that a constellation is at the zenith, where would you look for it?

• northern horizon

• southern horizon

• directly overhead

• eastern horizon

What is the celestial sphere?

• A model representing the sky as a dome surrounding the Earth

• A physical sphere located in space

• A constellation visible from Earth

• A type of telescope used in astronomy

Which of the following is a great circle on the celestial sphere?

• The ecliptic

• The prime meridian

• The horizon

• The nadir