Homework Help for Astronomy

Can the motion of a satellite orbiting the earth be described by Kepler’s three laws? Explain why and/or why not?

Limit your answer to less than 150 words.

Explain why a warm gas emits only light at specific wavelengths whereas a light bulb containing a heated wire produces a rainbow of colors.
Limit your answer to less than 150 words.

You look at a far away star in the night sky with a very precise telescope and notice it appears orange in color. What can you deduce about the star’s temperature, motion, and chemical composition?
Limit your answer to less than 150 words.

The Andromeda galaxy lies about 2.5 million light-years away. To what distance do the angular  resolutions of SST (3”), HST (0.05”), and a radio interferometer (0.001”) correspond at that distance?

14. Answer the following question and limit your answer to less than 200 words.

a) Give three ways in which ancient civilizations used the sun to help with daily activities.

b) For each one of the three ways mentioned, use your understanding of modern astronomy to explain whether the ancients were justified or misguided in their use of the sun.

13. Answer the following question based on the lecture videos and the required readings. Limit your answer to less than 100 words.

A) Give three reasons why our planet does not fly off into space or spiral into the sun.

The Ha line of a star is received on Earth at a wavelength of 656 nm. What is the star's radial velocity relative to Earth?

What will be the equivalent single-mirror diameter of a telescope constructed from two separate 10-m mirrors? four separate 8-m mirrors?

The Moon's mass is 7.4*10^22 kg, and its radius is 1,700 km. What would be the period and the speed of a spacecraft moving in a circular orbit just above the lunar surface?

I need help with the equation and the numbers to input

How long does it take for the Moon to move a distance equal to its own diameter of angular 0.5°? 

How long does it takes for the Moon to move a distance equal to its own diameter of angular 0.5 degrees. Finding the (a) Arc minutes, (b)Arc seconds, and another (c) arc seconds; minutes)

Given that the distance to the moon is 384,000km, and taking the Moon's orbit around Earth to be circular; estimates the speed (in kilometers per second) at which the Moon orbits Earth.

How long does it takes for the moon to move a distance equal to its own diameter of angular 0.5?

Given that earth orbits at 150000000 km from the sun through what distance does earth move in second? an hour? a day?