©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 1:25PM A+
ASTR 101: Exam 1 Questions And Answers
|Latest 2025 | Guaranteed Pass.
Constellations - Answer✔Recognizable patterns of stars in the sky (big dipper, orions belt)
Makes locating stars easier.
The official borders were set in 1928 by the International Astronomical Union (IAU).
How many constellations are there? - Answer✔88
Celestial sphere - Answer✔our view of the night sky; an artificial sky map created by
astronomers that applied a coordinate system to it, analogous to the coordinate system of
north-south latitude and east-west longitude used to navigate on the Earth. This Earth-based
view of the heavens is made by pretending that the stars are attached to the inside of an
enormous hollow shell, the celestial sphere, with the Earth at its center.
Celestial equator - Answer✔we obtain the celestial equator, which divides the sky into northern
and southern hemispheres, just as the Earth's equator divides the Earth into two hemispheres.
Ecliptic - Answer✔sun's path
North/south celestial pole - Answer✔We can also imagine projecting the Earth's North Pole and
South Pole out into space along the Earth's axis of rotation.
Sidereal day - Answer✔Star reference
23 hours and 56 minutes
Solar day - Answer✔Sun reference
24 hours
Difference between solar and sidereal day? - Answer✔Your favorite star will rise 4 minutes
earlier each successive night.
How long does it take the Earth to rotate (in hours)? - Answer✔24 hours
How long does it take the Earth to revolve (in decimal days)? - Answer✔365.25 days
How long does it take the Earth to precess (in years)? - Answer✔26,000 years.
1
, ©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 1:25PM A+
What causes seasons? - Answer✔Earths rotation on its axis which is 23.5 degrees
Equinox - Answer✔where the ecliptic intersects the celestial equator
Solsitice - Answer✔where the ecliptic is farthest from the celestial equator
Summer Solstice - Answer✔June 21st
Winter Solstice - Answer✔December 21st
Fall Equinox - Answer✔September 21st
Spring Equinox - Answer✔March 21st
Longest day of the year - Answer✔June 21st (beginning of summer)
Shortest day of the year - Answer✔December 21st (beginning of winter)
Lunar phases - Answer✔New moon: 0% visible
Waxing crescent: 1-49% visible
First quarter: 50%
Waxing gibbous: 51-99% visible
Full moon:100% visible
Waning gibbous: 99-51% visible
Third (last) quarter: 50% visible
Waning crescent: 49-1% visible
Length of a lunar month - Answer✔29.5 day cycle
Length of the Moon's orbit around the Earth - Answer✔27.3 days
Length of the Moon's rotation on its axis - Answer✔27.3 days
Why do we see phases of the Moon? - Answer✔the revolution of the moon around the Earth
allows us to see different amounts of the moon being illuminated
Why do we see the same face of the Moon from Earth? - Answer✔the moons rotation
period=moons orbital period. The moon has a heavy metal side
Three types of solar eclipses - Answer✔1)total
2)partial
3)annular (moon is closer to the sun, get a ring)
Three types of lunar eclipses - Answer✔1)total
2
ASTR 101: Exam 1 Questions And Answers
|Latest 2025 | Guaranteed Pass.
Constellations - Answer✔Recognizable patterns of stars in the sky (big dipper, orions belt)
Makes locating stars easier.
The official borders were set in 1928 by the International Astronomical Union (IAU).
How many constellations are there? - Answer✔88
Celestial sphere - Answer✔our view of the night sky; an artificial sky map created by
astronomers that applied a coordinate system to it, analogous to the coordinate system of
north-south latitude and east-west longitude used to navigate on the Earth. This Earth-based
view of the heavens is made by pretending that the stars are attached to the inside of an
enormous hollow shell, the celestial sphere, with the Earth at its center.
Celestial equator - Answer✔we obtain the celestial equator, which divides the sky into northern
and southern hemispheres, just as the Earth's equator divides the Earth into two hemispheres.
Ecliptic - Answer✔sun's path
North/south celestial pole - Answer✔We can also imagine projecting the Earth's North Pole and
South Pole out into space along the Earth's axis of rotation.
Sidereal day - Answer✔Star reference
23 hours and 56 minutes
Solar day - Answer✔Sun reference
24 hours
Difference between solar and sidereal day? - Answer✔Your favorite star will rise 4 minutes
earlier each successive night.
How long does it take the Earth to rotate (in hours)? - Answer✔24 hours
How long does it take the Earth to revolve (in decimal days)? - Answer✔365.25 days
How long does it take the Earth to precess (in years)? - Answer✔26,000 years.
1
, ©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 1:25PM A+
What causes seasons? - Answer✔Earths rotation on its axis which is 23.5 degrees
Equinox - Answer✔where the ecliptic intersects the celestial equator
Solsitice - Answer✔where the ecliptic is farthest from the celestial equator
Summer Solstice - Answer✔June 21st
Winter Solstice - Answer✔December 21st
Fall Equinox - Answer✔September 21st
Spring Equinox - Answer✔March 21st
Longest day of the year - Answer✔June 21st (beginning of summer)
Shortest day of the year - Answer✔December 21st (beginning of winter)
Lunar phases - Answer✔New moon: 0% visible
Waxing crescent: 1-49% visible
First quarter: 50%
Waxing gibbous: 51-99% visible
Full moon:100% visible
Waning gibbous: 99-51% visible
Third (last) quarter: 50% visible
Waning crescent: 49-1% visible
Length of a lunar month - Answer✔29.5 day cycle
Length of the Moon's orbit around the Earth - Answer✔27.3 days
Length of the Moon's rotation on its axis - Answer✔27.3 days
Why do we see phases of the Moon? - Answer✔the revolution of the moon around the Earth
allows us to see different amounts of the moon being illuminated
Why do we see the same face of the Moon from Earth? - Answer✔the moons rotation
period=moons orbital period. The moon has a heavy metal side
Three types of solar eclipses - Answer✔1)total
2)partial
3)annular (moon is closer to the sun, get a ring)
Three types of lunar eclipses - Answer✔1)total
2
