Info
Warning
Danger

Study Resources (Astronomy)

Question Aerogel or "solid smoke" is a novel material that is made of silicon dioxide, like glass, but is a thousand times less dense than glass because it is extremely porous. Material scientists at NASA's Jet Propulsion Laboratory created the lightest aerogel ever in 2002, with a density of 0.00011 pounds.
21 Views
View Answer
Question Classify the questions regarding extrasolar planets as True or False. True False Most extrasolar planets detected to date are thought to be gas giants close to their parent stars. True False Extrasolar planets with orbits like Saturn, Uranus and Neptune have not been detected yet because astronomers have not been observing long.
25 Views
View Answer
Question Jupiter and Saturn might have been in a gravitational resonance with each other at some point during the history of our solar system. Keeping Saturn’s distance to the sun fixed at its current location (9.54 AU) with an orbital period of 29.4 years, how far away from the sun should.
29 Views
View Answer
Question Why it's not explained just by Doppler redshift caused by faster movement of those galaxies billions of years ago when that light was emitted? Would the speeds of the galaxies necessary for Doppler redshift to explain all of the observed galaxies redshift be unreasonable or is there something else that prevents.
25 Views
View Answer
Question Some general astrophysics questions: Answer all! At what optical depth does T = Teff? What is the probability for a photon emitted from this location (headed outward) to escape to infinity? What is the approximate pressure at this location? What does doppler broadening mean? What do the widths of observed lines tell.
27 Views
View Answer
Question You're writing a galatic history involving two civilizations that evolve on opposite sides of a 1.0*10^5 -ly-diameter galaxy. In the galaxy's reference frame, civilization B launched its first spacecraft 45,000 years after civilzation A. You and your readers, from a more advanced civilization, are traveling through the galaxy at 0.99c.
28 Views
View Answer
Question 1- The polar ice caps on Mars are an example of what type of glacier? Select one: a. piedmont glaciers b. valley glaciers c. continental glaciers d. cirque glaciers 2- When an unstable parent isotope decays, which of these is true? Select one: a. The daughter isotope may continue to decay. b. The parent isotope's rate of decay slows. c. The parent.
28 Views
View Answer
Question Astronomers have only been able to measure accurate Doppler shifts for stars for about fifteen years. If we were trying to detect planets in orbit around the Sun from alpha Centauri, we would have only detected Jovian planets with orbital periods less than 15 years. This would include _______ Jovian.
23 Views
View Answer
Question Every star is part of a constellation and is assigned a Greek letter within the constellation. Many stars still bear ancient Arabic names. Based on how astronomers refer to stars, select all of the correct statements from the following list. A. All stars are part of some constellation. B. A star with.
27 Views
View Answer
Question Ch23, Light, Astronomical Observations, and the Sun, and Ch 24 Of visible colors, red light has the longest wavelength, understand the Doppler effect/red shift that demonstrates universe is expanding; understand nuclear fusion powers the sun, fusing hydrogen atoms to create helium; Earth is an average sized planet rotating around an.
25 Views
View Answer