10/5/2016 Astronomy 122 Lecture Notes
A. IR = Longer wavelength than visible light
B. Infrared cameras see wavelengths about 20 times longer than what we can see
with our eyes
C. It is like you are seeing heat waves
10/12/2016 Astronomy 122 Lecture Notes
A. All of them are too far away to see detail which means we can only see dot
images right now
B. The discovery of these exoplanets completely changes our place in the universe
again. We now know that t
9/28/16 Astronomy 122 Lecture Notes
What to want from this astronomy class
A. Astronomical perspective
1. Sense of scale of the universe
2. Relative and absolute sizes of objects
B. Connection to modern astronomy
1. What's being discovered today
10/19/2016 Astronomy 122 Lecture Notes
The Ultimate Speed Limit (c)
A. Light travels at a finite speed, and nothing can travel faster than this
B. 186,000 miles/sec which is about 7 times around the earth in 1 second
C. Because of the fact that it take
10/24/2016 Astronomy 122 Lecture Notes
Class began with a review of Fridays Midterm #1
The only elements that were created in the big bang are hydrogen and helium and a small
amount of lithium
How did we come to be?
A. Galactic recycling
B. Stars slowl
10/10/2016 Astronomy 122 Lecture Notes
1. An object that orbits around a planet or a dwarf planet
2. Enceladus : a moon of Saturn
a) Water ice fountains (geysers) on the moon suggest that it might
have liquid water below the surface
10/7/2016 Astronomy 122 Lecture Notes
1. A large glowing ball of gas that generates heat and light through nuclear
1. A moderately large object that orbits a star; it shines by reflected light.
Planets may be rocky,
10/3/16 Astronomy 122 Lecture Notes
A. Mirror has a diameter of 27 ft
B. Telescope is 72 ft tall
C. The primary mirror weighs 22 tons
D. 342 tons of moving mass
TMT Thirty Meter Telescope
A. The biggest current telescopes such as Gemini are
10/14/2016 Astronomy 122 Lecture Notes
The Pluto Situation
A. Kuiper Belt Object - an object with an orbit that extends beyond neptune and
into the Kuiper Belt
B. There is not just one Pluto. There are thousands
C. Pluto was not demoted it was actually
10/17/2016 Astronomy 122 Lecture Notes
In class Dr. Fisher showed us the top ten postcards that were sent in and then we were given
homework number three which is now on canvas.
A. A great island of stars in space, all held together by gravity a
1. Compare the sizes or the Earth, Sun, Milky Way Galaxy, and the Universe as a
15, 000 km, 1,500,000, 100,000 light years, 1,000,000
What does an astronomer mean by the Universe?
The totality of all space, time, matter, and ener
1. What did Galileo discover which supported the Copernican model? Explain.
He found that Jupiter had 4 moons orbiting the planet, and Venus went
through phases that can only be explained by the planets motion around the
2. What was
1. What contributions did Chinese and Islamic astronomers make during the Dark
Ages in Europe?
Chinese: records of supernovae.
Islamic: Trigonometric methods to determine precise dates.
2. Describe the geocentric model of the Universe.
Origin of the Solar System
1. List at least six properties of the solar system any model of its formation must
Separate isolated planets, ecliptic, differentiation, oort cloud, kuiper belt,
planets orbits are almost circular in the same direction