7/3/25, 9:06 AM Astro 1 Final Exam PSU 2025 COMPREHENSIVE EXAM QUESTIONS |FREQUENTLY TESTED QUESTIONS |RECENTLY TESTIN…
Astro 1 Final Exam PSU 2025 COMPREHENSIVE
EXAM QUESTIONS |FREQUENTLY TESTED
QUESTIONS |RECENTLY TESTING REAL EXAM
QUESTIONS|VERIFIED SOLUTIONS (100%
CORRECT)
Save
Terms in this set (99)
What is a light year? distance that light travels in 1 year
What is the closest star to proxima centauri
Earth besides the Sun?
(4.2 ly away)
What is the age of the 14 billion years
universe?
What is our cosmic Earth, solar system, milky way galaxy, local group,
address? What is the Local local supercluster
Group?
Order of planets in our Mercury, venus, earth, mars, jupiter, saturn, uranus,
solar system neptune
What is the fastest speed speed of light
in the universe?
Typical composition of 74% H, 25% He, 1% Metals
stars
https://quizlet.com/1058280282/astro-1-final-exam-psu-2025-comprehensive-exam-questions-frequently-tested-questions-recently-testing-real-exam-… 1/12
, 7/3/25, 9:06 AM Astro 1 Final Exam PSU 2025 COMPREHENSIVE EXAM QUESTIONS |FREQUENTLY TESTED QUESTIONS |RECENTLY TESTIN…
How old is the Sun/solar 4.5 billion, live to 10 billion
system? How much longer
will it live?
glowing ball of hot dense gas that generates its own
What is a star?
energy via nuclear fusion
What is the reason that we tilt of the earth's axis determines what hemisphere
have seasons on Earth? leans towards the sun
If Earth's orbit were a Would not because earth's orbit is already very close
perfect circle, how would to a perfect circle
this affect seasons?
new moon, waxing crescent, first quarter moon,
moon phases in order waxing gibbous, full moon, waning gibbous, third
quarter moon, waning crescent
How long does it take to 29.5 days
complete all the phases?
What are the two types of lunar: earth blocks sunlight from moon, full moon
eclipses (only solar and solar: moon passing directly in front of sun, new moon
lunar) and what phase
does the Moon need
to be in for each one of
the eclipses to occur?
If you see that the Moon is the same phase, the moon will just look upside down
full, what phase will people on the moon wouldn't see earth (new earth)
someone in Australia see?
What about
someone on the Moon
looking at Earth?
1.) a^3=p^2(M1+M2)
2.) when planet is closer to sun, it moves faster in its
Kepler's laws
orbit
3.) planets further from sun orbit slower
https://quizlet.com/1058280282/astro-1-final-exam-psu-2025-comprehensive-exam-questions-frequently-tested-questions-recently-testing-real-exam-… 2/12
Astro 1 Final Exam PSU 2025 COMPREHENSIVE
EXAM QUESTIONS |FREQUENTLY TESTED
QUESTIONS |RECENTLY TESTING REAL EXAM
QUESTIONS|VERIFIED SOLUTIONS (100%
CORRECT)
Save
Terms in this set (99)
What is a light year? distance that light travels in 1 year
What is the closest star to proxima centauri
Earth besides the Sun?
(4.2 ly away)
What is the age of the 14 billion years
universe?
What is our cosmic Earth, solar system, milky way galaxy, local group,
address? What is the Local local supercluster
Group?
Order of planets in our Mercury, venus, earth, mars, jupiter, saturn, uranus,
solar system neptune
What is the fastest speed speed of light
in the universe?
Typical composition of 74% H, 25% He, 1% Metals
stars
https://quizlet.com/1058280282/astro-1-final-exam-psu-2025-comprehensive-exam-questions-frequently-tested-questions-recently-testing-real-exam-… 1/12
, 7/3/25, 9:06 AM Astro 1 Final Exam PSU 2025 COMPREHENSIVE EXAM QUESTIONS |FREQUENTLY TESTED QUESTIONS |RECENTLY TESTIN…
How old is the Sun/solar 4.5 billion, live to 10 billion
system? How much longer
will it live?
glowing ball of hot dense gas that generates its own
What is a star?
energy via nuclear fusion
What is the reason that we tilt of the earth's axis determines what hemisphere
have seasons on Earth? leans towards the sun
If Earth's orbit were a Would not because earth's orbit is already very close
perfect circle, how would to a perfect circle
this affect seasons?
new moon, waxing crescent, first quarter moon,
moon phases in order waxing gibbous, full moon, waning gibbous, third
quarter moon, waning crescent
How long does it take to 29.5 days
complete all the phases?
What are the two types of lunar: earth blocks sunlight from moon, full moon
eclipses (only solar and solar: moon passing directly in front of sun, new moon
lunar) and what phase
does the Moon need
to be in for each one of
the eclipses to occur?
If you see that the Moon is the same phase, the moon will just look upside down
full, what phase will people on the moon wouldn't see earth (new earth)
someone in Australia see?
What about
someone on the Moon
looking at Earth?
1.) a^3=p^2(M1+M2)
2.) when planet is closer to sun, it moves faster in its
Kepler's laws
orbit
3.) planets further from sun orbit slower
https://quizlet.com/1058280282/astro-1-final-exam-psu-2025-comprehensive-exam-questions-frequently-tested-questions-recently-testing-real-exam-… 2/12
