Astro 1 (PSU) exam 2 |61
Questions and Answers
Copernicus - -Had idea of sun centered universe (heliocentric)
- Keplers 1st law - -Planets revolve around the sun in elliptical orbits w/ sun
at the focus
- What best describes orbit of earth around the sun - -Ellipse that is close to
a circle
- Keplers 2nd law supports idea that when a plant is closer to the sun its
speed is greater - True or False - -True
- How did Kepler originally state the 2nd law - -A line joining a plant and sun
sweeps out equal areas in equal intervals of time
- Keplers 3rd law - -The square of a time period for an orbit of a planet is
proportional to the cube of its average distance from the sun. ( P^2 = A^3)
- Saturn is 10 times as far from the sun as earth, how many times does
earth orbit the sun in time Saturn does once - -30 times (30 years)
- Besides discovery of moons orbit Jupiter, what else did Galileo find to prove
earth wasn't at center of universe? - -Phases of Venus
- What does "P" represent in Kepler's 3rd law - -Orbital period
- Of the 4 Galilean moons which is closer to Jupiter? - -"IO"
- Which moon of Jupiter is believed to have liquid beneath ice? - -"Europa"
- Which moon of Jupiter is largest? - -"Ganymede"
- Mass of Jupiter relative to earth - -340 earth masses
- Nearest planet to the sun? - -Mercury
- Temp of Mercury - -80 kelvin (-290 F)
- How long is a day on Mercury? - -176 times as long as an earth day
(Rotation is slow)
- Gravity formula - -G = M/R^2
, G = gravity
M = Mass
R = Radius
- Density formula - -D = M/V
D = Density
M = Mass
V = Volume
- Volume of sphere - -V = (4/3)(pi)(r^3)
- Density of water - -1 g per cubic cm (most gases are much less)
- Venus temperature
and more facts - -1. 735 K (880 F)
2. Has slow rotation
3. a day/night cycle is longer than an earth year
4,. Venus is closer to the sun than earth
- Looking in the sky from Venus where would the sun rise and set? - -Rise in
the West and set in the East
- 2nd most massive asteroid - -Vesta
- Jupiter density and make up - -1. Density of milk
2. Made up of hydrogen and helium
- 4 inner ; terrestrial planets - -Mercury
Venus
Earth
Mars
- If Jupiter was the size of a basketball, earth would be a ______ - -Marble
- what is the red spot on Jupiter ? - -Storm that lasted 300 years
- How long are Jupiters days - -10 earth hours long
- 1 Jupiter year is how many earth years - -12
- What is Saturn made of - -Hydrogen and Helium
- Jovian planets - -Jupiter
Saturn
Questions and Answers
Copernicus - -Had idea of sun centered universe (heliocentric)
- Keplers 1st law - -Planets revolve around the sun in elliptical orbits w/ sun
at the focus
- What best describes orbit of earth around the sun - -Ellipse that is close to
a circle
- Keplers 2nd law supports idea that when a plant is closer to the sun its
speed is greater - True or False - -True
- How did Kepler originally state the 2nd law - -A line joining a plant and sun
sweeps out equal areas in equal intervals of time
- Keplers 3rd law - -The square of a time period for an orbit of a planet is
proportional to the cube of its average distance from the sun. ( P^2 = A^3)
- Saturn is 10 times as far from the sun as earth, how many times does
earth orbit the sun in time Saturn does once - -30 times (30 years)
- Besides discovery of moons orbit Jupiter, what else did Galileo find to prove
earth wasn't at center of universe? - -Phases of Venus
- What does "P" represent in Kepler's 3rd law - -Orbital period
- Of the 4 Galilean moons which is closer to Jupiter? - -"IO"
- Which moon of Jupiter is believed to have liquid beneath ice? - -"Europa"
- Which moon of Jupiter is largest? - -"Ganymede"
- Mass of Jupiter relative to earth - -340 earth masses
- Nearest planet to the sun? - -Mercury
- Temp of Mercury - -80 kelvin (-290 F)
- How long is a day on Mercury? - -176 times as long as an earth day
(Rotation is slow)
- Gravity formula - -G = M/R^2
, G = gravity
M = Mass
R = Radius
- Density formula - -D = M/V
D = Density
M = Mass
V = Volume
- Volume of sphere - -V = (4/3)(pi)(r^3)
- Density of water - -1 g per cubic cm (most gases are much less)
- Venus temperature
and more facts - -1. 735 K (880 F)
2. Has slow rotation
3. a day/night cycle is longer than an earth year
4,. Venus is closer to the sun than earth
- Looking in the sky from Venus where would the sun rise and set? - -Rise in
the West and set in the East
- 2nd most massive asteroid - -Vesta
- Jupiter density and make up - -1. Density of milk
2. Made up of hydrogen and helium
- 4 inner ; terrestrial planets - -Mercury
Venus
Earth
Mars
- If Jupiter was the size of a basketball, earth would be a ______ - -Marble
- what is the red spot on Jupiter ? - -Storm that lasted 300 years
- How long are Jupiters days - -10 earth hours long
- 1 Jupiter year is how many earth years - -12
- What is Saturn made of - -Hydrogen and Helium
- Jovian planets - -Jupiter
Saturn
