1. In the last few years, scientists have discovered that the Martian polar caps have more
water ice in them and less frozen carbon dioxide than previously thought. Summarize some
of the implications of this result in term
1. a) Determine the time it takes (in days) for the 4 satellites to now appear all on either the
right side or the left side again.
b) How many days (or fractional days) does this configuration (4 satellites all on
Astronomy 121 Spring 2015 Homework Assignments
Homework Assignment 1- Scale of the Universe
I found the picture of the entire Universe extremely interesting for a variety
of reasons. First, it shows that there is far
a hypothesis that the bodies in some orbital systems, including the Sun's,
orbit at semi-major axes in an exponential function of planetary sequence.
The hypothesis correctly predicted the orbits of Ceres and Uranus, but failed
differential rotation on jupiter:
rotation rate is not constant from one location to another
what does Jupiter's flattening tell us about its interior?
rotates very rapidly; possible to infer large rocky core
how did Voyager and Galileo chan
why do saturns rings sometimes disappear?
saturns rings lie on the planet's equatorial plane. As saturn moves along its
orbit, the angle at which the rings are illuminated vary. When the planets
north or south pole is tipped toward the sun, t
why is venus so bright in the sky?
highly reflective due to clouds high in the atmosphere (70% of sunlight
reaching venus goes back into space)
why is venus always near the sun in the sky?
venus is the brightest when it is closest to the sun b
The Solar System
Prof. Jim Schombert
Office: 461 Willamette, 6-5214
Office Hours: 10-11am MWF
The past 20 years has seen an explosion in our understanding of the contents, formation
and evolution o
What are comets like when they are far from the Sun? What happens
when they enter the inner solar system?
when comets are not near the sun, they are a small frozen nucleus of ice. it
appears as a minute point of light.
when it comes to close
Scattering of light from particles smaller than its wavelength (e.g.
The scattering intensity is proportional to the fourth power of the frequency,
so blue light scatters about ten times as much as red light. T
how was uranus discovered?
telescopic observation (1781) by Herschel. at first he thought it was either a
nebulous star or a comet because in his telescope it appeared as a disk in his
tiny telescope and moved relative to the stars
why does U
Chapter 10 Notes
Atmospheric conditions in the Southern Hemisphere of Mars during the
sunlight hits cap and carbon dioxide evaporates into air. atmospheric
pressure is higher
Describe the two Martian polar caps:
Northern cap: residual of water ice
What are the Trojan, Apollo, and Amor asteroids?
Trojan: several hundred asteroids orbiting at the distance of jupiter. locked
into 1:1 orbit with jupiter.
Apollo: earth-crossing asteroids.
Amor: mars-crossing asteroids.
How are asteroid ma
1. In the past, Astronomers used constellations as a way of keeping time. Constellations
are useful to map the sky. They tell you exactly where you are looking and are extremely
useful in naming and locating objects i
ASTR 121 HW #5
8 March 2011
2. Research and describe the Gliese 581 planetary system which has recently been detected.
How does this planetary system differ from other exosolar systems detected to date and
why are astronomers relatively
ASTR HW #4
23 February 2011
1. Summarize some of the implications associated with the recent discovery of vast
reserves of hydrocarbons on Titan.
It has recently been discovered that Titan, Jupiters largest moon, has more liq
1. Kepler's third law sets the relative size of the solar system as it defines a relation between
orbital period (as measured in earth years) and orbital distance (as measured in AUs). One
AU = one astronomical unit = the
Astronomy 121 Exam 1 Study Guide
Mauna Kea- TMT 30 foot telescope.
Cosmic universe. Edge of the universe
Star- A large, glowing ball of gas that generates heat and light through nuclear
Planet- Moderately large objects that orbits a star; it shine