Chapter 1-3

# Chapter 1-3 - Star B and Star C has an intensity ratio of 16 5 If you are at latitude of 35 degrees north of earth’s equator The north celestial

This preview shows pages 1–2. Sign up to view the full content.

Astronomy –odd- numbered –Homework CHAPTER 1 1. 1 mile = 1.609 km = 1609 m = 160900 cm 2.54 cm = 1 inch 7928 miles = 1,275,615,200 cm = 1.2756152e+9 inch = 1,759.623 yard 3. 1.5 x10^8 km = 150,000,000 km = 150x10^6 km 5. light from the sun takes 8 minutes to reach Earth. It takes about 12.6 minutes to reach mars. 7. v = 3.10^5 km/s 1 year = 365 days = 31,536,000 seconds So, 1 light year = 31,536,000 x3. 10^5 km = 94,608,000 x 10^5 km =94608 x 10^8 km = 94608 x 10^11 m 9. 2 million ly ? 1ly = 10^13 km 2,000,000 ly = 2x10^6x10^13km =2 x 10^19 km = 2 x 10^22m CHAPTER 2 1. The difference would be 4 magnitudes lower (or better). The sun is about -26.7 in magnitude, and the moon is about -12 in magnitude. A star would be the brightest star if it started with the negative number in magnitudes 3. Star A has a magnitude of 2.5 Star B has a magnitude of 5.5 Star C has a magnitude of 9.5 - Star A is the brightest star - Star A and star B should be visible to the naked eye on a dark night

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: - Star B and Star C has an intensity ratio of 16 5. If you are at latitude of 35 degrees north of earth’s equator:- The north celestial pole would be 35 degrees above the horizon- The south celestial pole would be 35 degrees below the horizon CHAPTER 3 1. If earth is about 4.6 billion years old, 1 period = 25800 year à there are about : (4.6 10^9)/(25800) = 178,295 cycles 3. Identify the phases of the moon if at the sunset the moon were a. near the eastern horizon : the moon is full b. high in the south : it should be a half moon c. southeast : the moon is off to the side, but the moon is a bit behind the right angle position d. southwest : the moon is half the sunlit side ( its last quarter) 7. a total eclipse of the sun was visible from Canada on July 10, 1972,so this eclipse occurs next on Friday, august 1 st 2008 . totality ended over the middle of atlantic....
View Full Document

## This note was uploaded on 03/15/2012 for the course ASTR C100 taught by Professor K.ostrowski during the Fall '11 term at Coastline Community College.

### Page1 / 2

Chapter 1-3 - Star B and Star C has an intensity ratio of 16 5 If you are at latitude of 35 degrees north of earth’s equator The north celestial

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online