1. Geologic activity is driven by the radioactive decay of elements in
the cores of the worlds. The earth has 10x the amount of geologic
activity, although we dont see it all the time. Large worlds such as
the earth (compared to the moon) have a greater p
The Roche Limit for Saturn lies about 2.5 planetary radii away. This distance is
The gaps in the rings of Saturn are caused by
near the edge of the rings
resonances with moons changing the ring particle's orbits
What does saturated mean?
Lesson 7 Giant Planet Satellites
Worlds that are no longer geologically active and have been for a long time
Types of Giant Planet Satellites
Reside very close and are found inside a line called the Roche limit
Life on Earth
Where are all the craters?
We know that lots of planets bear the scars of craters but not earth
Earth doesnt look like it has craters, or mare so we have to look hard
o We have to unearth them
The earth should have lots of craters, Earth is
Astro 150 Lecture 2
Our sole motivation for going to the moon was to beat the soviets and win the space race
In 1957, the soviets had figured out how to launch a satellite into space and into orbit
o Marked the beginning of the space race
o Dark, low albedo regions, latin for sea
o Smooth, few craters, younger surfaces
o Likely a result of lava flows
o Bright, high albedo regions
o High albedo
o Old impacts, old surfaces, many craters
More mare on front side on moon
Lesson 6 - Meteorites
Where do meteorites fall?
Everywhere. They fall all over the Earth
They are not collected uniformly
o Most are never found because 70% of the Earth is covered by water so most fall in the
sea and ocean
o Others that fall in forests o
Lecture 4, Part 2 Atmospheres of terrestrial planets
The pressures and temperatures of Mars, Venus, and Earth have almost nothing in common
Composition of the atmospheres of venus and mars are very similar
There are two properties of a
The fraction of a surface that has been cratered (y-axis)
The diameters of the craters are on the x axis
Mare surfaces have fewer craters of all sizes
o Large lack of impact basins and large craters
o Lots of impacts, craters.
Albedo of Venus is high, same as notebook paper
o Clouds high up on Venus reflect a lot of the light from the sun
o High density, moment of inertia factor, size, gravity are identical to earth.
Surface temp on Venus is 873 Fahrenheit, and atm
Astro Lesson 8 Pluto and New Horizons
Lo, Europa, Triton, and tiny Enceladus
Geologic activity scales with size
However, it also depends on the composition of the planet itself.
Can be driven on icy planets for longer time because it takes less energy for
Lesson 9 Giant Planet Atmospheres
Giant planets have huge atmospheres and huge magnetic fields, they are powered by meteorological
Gas giants fall under 2 categories
True gas giants
o Jupiter, Saturn
o Uranus, Neptune 4 times the size
Start by reviewing the 'Learning Goals' from each presentation
if you can address most of the questions and understand the themes on
those slides, you are already in good shape!
All of my questions for the final usually address the major course
Your Astro 150 Team
Dr. Nicole (Silvestri) Kelly
Syllabus - Highlights
Weekly Online Quizzes
Cover material from le
Today's Topic: The Moon
The Moon as an Ancient World Prototype
Planetary Vocabulary for the Course
Surface Features of the Moon
Can we determine the following for Lunar Features:
How they were formed?
Their source of energy?
Chapter 1 Vocab
Exactly where you are in the universe, the Earth in the solar system in the milky way, in the
local group of galaxies, within a super cluster. Within the universe
Billion = 1,000,000,000 = 10^9
Million = 1,000,000 =
Astro 150 Lesson 1 Quiz
The Sun contains what percentage of the mass of the Solar System?
A world with a density of 3.4 g/cm3 would be composed of
mostly ice with a little rock
mostly rock with a little
ICY DWARFS II
How did the Kuiper belt form?
What is the Kuiper belts relation to Pluto and Triton?
What is the Kuiper Belts relation to comets?
Pluto is too small to hold onto an atmosphere but it has a very small one.
It constantly makes more atmospher
1. Turn in Crater Coun1ng Ac1vity (front table)
1. Make sure you include data table and ques1ons 1-12
2. Radioac1ve Da1ng Overview
3. Old Exam Ques1on (related to radioac1ve
Exam 1 is next week on Th
Astr 150, Summer 2014
Exoplanets : outline
1) Why should we look for them
2) Types of exoplanets discovered
3) Detection methods
4) Planetary atmospheres
5) Habitable zones
Understanding formation of planets
- can we predict that SS s
Meteorites and Impact-Related Objects (20pts)
Meteorites are fragments of other worlds that have survived entry into the Earths atmosphere.
Most meteorites originate in the asteroid belt from bodies that forme