General Geosciences and Astrophysics I -Astrophysics-. Marcus Brüggen. 1. Our Place in the Universe. TEXTBOOK: The Universe , Freedman & Kaufmann Freeman & Co. ISBN 0-7167-9884-0. Lecture 1: Contents and Scales of the Universe.
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General Geosciences and Astrophysics I
1. Our Place in the Universe
TEXTBOOK: The Universe, Freedman & Kaufmann
Freeman & Co.
Lecture 1: Contents and Scales of the Universe
A relatively small and rocky object which orbits a star.
A relatively small and icy object which orbits a star.
An object which orbits a planet.
A moderately large object which orbits a star; it shines by reflected light. Planets may be rocky, icy, or gaseous in composition.
A large, glowing ball of gas that generates heat and light through nuclear fusion
A star and all the material which orbits it, including its planets and moons
An interstellar cloud
of gas and/or dust
A great island of stars in space, all held together by gravity and orbiting a common center
The total sum of all matter and energy; that is, everything within and between all galaxies
What does this mean?
1500 light years away!
Where is the nearest star?
(1 mo: 1.17 billion yrs)
The Earth rotates around it’s axis once every day!
The Earth orbits the Sun once every year.
The Earth’s axis is tilted by 23.5º!
Our Sun moves relative to the other stars in the local Solar neighborhood!
Our Sun and the stars of the local Solar neighborhood orbit around the center of the Milky Way Galaxy every 230 million years!
astronomical objects and events
affected life on Earth?
Here’s some ideas…
Homework: Read page 1-17 in Universe