Atronomy

Topics: Sun, Earth, Moon Pages: 42 (7699 words) Published: April 3, 2014
Class description: non-mathematical presentation of our knowledge of the universe. Includes birth and death of stars, formation of solar system, black holes, quasars, and the fourth dimension.

Instructor: Erin O’ Connor
Office: EBS112
Email: eboconnor@pipeline.sbcc.edu
Office Hours:
Monday- After class at 11 am and email.
Tuesday- After class at 9:05 pm and email.
Wednesday- EBS112 After class at 11 am (PS101) and email.
Thursday- EBS112 email for appointment.
Friday- EBS112 email for appointment.

Transferability: CSU, UC Transfer limit.
Skills advised: English 103, Math 1.
Textbooks- Astro 2 and Earth 101 Lecture kit
Grading: based on consistent performance. All assignments are required! 90’s= A 80s= B 70s= C 60s= D Below 60s= F

Point values
Tests (approx. 4-6 for the semester) 100pts. Ea.
Clicker Quizzes (given at start, during, and end of class) 10-20 pts ea. Homework (assigned and due on a given date) 10-20 pts ea.
Web-based activities, Group activities, projects, assigned videos 0-50 pts. Assigned Videos (TBA) 0-30 pts. Ea.
FINAL (Cumulative, with 2 parts) 100-200 pts.

Main things that will be focused upon:
•Describe the size and the scale of the components of the universe and discriminate between various, models of celestial motions. Predict the consequences of these motions. •Compare and contrast various components of the solar system, how they form, and how they relate to Earth. •Use the components of the electromagnetic spectrum to investigate stars and stellar evolution. Demonstrate how stars, nebulae, galaxies, and quasars have been used to explore the concepts of relativity and cosmology. •Astronomy lab is held at SB Museum of Natural History.

The Sun
•The sun is a star
• At the core of the sun, there are nuclear reactions which give us light, heat, and energy. •speed of light c= 186,000 mile/second
• A light year is a unit of distance.
•The days of the week are named after planets:
Sunday- Sun
Monday- Moon
Tuesday – Mars
Wednesday- Mercury
Thursday- Jupiter
Friday- Venus
Saturday- Saturn
Distance units
1000 mm= 1 meter
3 feet= 1 yard
93,000,000 mi= 1 Astronomical Unit = 1 AU
1,000= 1 thousand
1,000,000= 1 million
1,000,000,000 = 1 billion
1 x 101 = 1 x 10 = 10
1 x 102 =1 x 10 x 10= 100
1 x 103 = 1 x 10 x 10 x 10 = 1,000
1 x 106 = 1 million
1 x 109 = 1 billion

Circumference of Earth= 24,000 mi

Rotation-
1,000 mph at the equator
800 mph at Santa Barbara
0 mph at the North Pole
Revolution-
Earth travels at 65,000 mph to travel around the sun in 1 year. Galactic Orbit- 500,000 mph

Characteristics of Planets:
Orbits around the Sun
Generally round
Cleared its neighborhood of debris

•A shooting star is when Earth hits rocks and debris at 65,000 mph • The moon is ¼ of the diameter of Earth and 1/100th of Earth’s mass.

Earth diameter 8,000 mi = 1
Moon diameter 2,000 mi = ¼ of 
•Distance from moon to Earth = 240,000 miles
Sun diameter = 864,000 miles = 108 Earths
•Distance from Sun to Earth= 93,000,000 miles
Winter= 91,000,000 miles
Early July= 95,000,000 miles
Motions
Rotations- Seasons
• Magnitude is the brightness of a star
• Astronomers measure distance between stars with angles.

•Sometimes the moon appears larger with Elliptical orbit.
• Moon and sun illusion = optical illusion
•Period of rotation = 1 day, approximately 24 hours.
• Period of revolution = about 365 days and ¼
• 1 year= all 4 seasons, completed.

ROTATION

West East

Eastward, or Direct Motion

•North Star is special because of its position. It does not appear to move. •Orbit of revolution= when planets move around the Sun.

Ecliptic plane

• There are probably over 200 billion stars
• Our galaxy is 100,000 light-years.
•Only major galaxy...
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