Expert Academic Help for Courses
What is cosmic inflation? How does inflation solve the horizon problem? The flatness problem?
Can I get help with describing the four layers in the distance-measurement ladder involved in determining the distance to a galaxy lying 5 Mpc away?
1. What is the significance of studying active versus normal galaxies? Explain. 2. Do you think that our galaxy has ever been an active galaxy? Could it have hosted a quasar when it was young? 3. How can collisions affect the shape of galaxies? What evidence can you cite that galactic cannibalism really happens?
Do you think that planet-sized objects discovered in orbit around a pulsar should be called planets? Why or why not?
Given the unpredictability of sunspot activity and its ability to virtually shut down for extended periods of time, do you feel it is necessary to study sunspot activity? Why?
Can I get examples and details of Voyager, Galileo, and Cassini missions?
Hi. 3. Phobos, the inner moon of Mars, has an orbital period of 0.32 days. Deimos the outer Martian moon has a period of 1.26 days. How often will Phobos and Deimos be aligned as seen from the surface of Mars? Please include the formula and units also. Thanks.
A hypothetical planet travels in an elliptical orbit around the Sun. The perihelion distance is 2.65 AU and the aphelion distance is 2.85 AU. For this hypothetical planet determine: a) the semi-major axis of its orbit. b) the sidereal period. c) the synodic period as seen from the Earth.
Hi. Using the following orbital data for Venus, determine the mass of the Sun. a=1.08x10 11m p=224.68 days. Please include the formula and units. Thanks.
How many of the terms in the Drake equation are known with any degree of certainty and which factor is the least well known?
How does cosmic background radiation relate to the Big Bang theory? (Answered in approximately 100 words.)
Explain cosmic background radiation and relation to big bang theory.
Explain whether or not life ever existed on Mars.
Explain why quasars represent early galactic evolution.
Over 200 word response with reference that compares normal and active galaxies.
Over 200 word response with reference that describes how to test the theory of general relativity.
Over 200 word response with reference that explains how a star forms into a star like the Sun.
Over 200 word response with reference that explains how astronomers determine the life span of a star using the H-R diagram.
Over 200 word response with reference that explains how energy reaches Earth from the solar core.
Describe how the four Jovian planets get their colors.
Describe the various layers of Saturn in comparison to those of Jupiter.
Over 200 word essay with reference that explains what would happen if a 10-km asteroid struck the Earth.
Over 200 word essay with reference that explains why the moon is heavily cratered and the Earth isn't.
Over 200 word essay with reference that covers the definition of interferometry and how it affects radio astronomy.
Over 200 word essay with reference in regards to three advantages of reflecting telescopes over refracting telescopes.
Provides over 200 word essay and reference in regards to the length of the solar day and the process if the Earth's rotation was to reverse direction.
Describe the role of collisions in the formation and evolution of galaxies.
Briefly describe Kepler's three laws of planetary motion. Explain how Kepler's laws allow us to use motion of an asteroid to find its average distance from the Sun.
Compare and contrast the properties of open and globular star clusters.
How do stars of low mass and high mass die?