Astronomy Expert Answers & Study Resources : Page 5

Question what difference do you find between the traditional and the modern astronomical dates? .

Question Stars like the Sun eject material after the red giant phase to create a(n) __________ which is a low density cloud of gas which may be enriched in elements more massive than hydrogen. A.) giant molecular cloud B.) dark nebula C.) supernova remnant D.) planetary nebula .

Question ?Since Saturn and Jupiter are both made up of mostly hydrogen and helium, why isnt Saturn the same color as Jupiter? .

Question How is our atmosphere different from the atmospheres on Venus and Mars? .

Question Imagine a planet named X83 where land surface from the poles to the equator is heated evenly by the sun and there are no major water bodies. Comment on the planetary circulation on this planet? Compare this situation to that of planet Earth. .

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.

Question How many days are there in a Gregorian solar year? .

Question Extensive bathymetric (both sound and satellite) surveys yield physiographic maps of the floor of the ocean basins Island Guyot Abyssal hills Continent Shelf Slope Rise Abyssal plain 1500 km .

Question If you lived on Mars, which planets would exhibit retrograde motion? .

Question in what year did the sun enter Gemini about May 21st? .

Question 20. What is the HR diagram? 21. What is the main characteristic of the stars in the main sequence? 22. What is the spectral class of the Sun? 23. How is the HR diagram of an old stellar cluster different from a young one? 24. What keeps the main sequence stars from gravitational.

Question Astronomers most frequently detect the presence of planets around other stars by measuring the ________ of the star over a period of time. A.)Doppler shift B.) distance C.) color D.) proper motion E.) brightness .

Question Sun is biggest star ? true or false .

Question based on current scientific evidence, the theory that has been most successful at explaining the origin of life on Earth is: a) naturism b) panspermia c) intelligent design d) chemical evolution .

Question Imagine that we have just discovered a new planet in a solar system very much like our own. The planet orbits a star that is the same mass and age as the Sun. You and your intrepid group have been assigned to identify some of the basic characteristics of this.

Question Write down the nature of the images for the astronomical telescope, Galilean telescope and the microscope. Are the images inverted? Erect? Real? Virtual?   .

Question How is it known that the Chelyabinsk meteor and asteroid 2012 DA14, which passed between the Earth and the Moon on the same day, are unrelated? .

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.

Question NASA has been busy readying a mission to Europa, Jupiter's third largest moon. Evidence dating back at least to the Voyager 1 and 2 flybys indicate the presence of an internal ocean, which could make Europa one of the best places to look for life outside of Earth. If anyone.

Question Given what we know about the main-sequence lifetimes of stars, ________ stars would not be stable long enough for advanced life forms to evolve on their planets. A.) B B.) G C.) M D.) K   .

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.

Question find the center of mass of the earth-moon system. where is that center of mass relative to the surface of the moon. .

Question Count stars Lab : Procedure : 1. Draw a grid of twenty squares on a piece of paper. Each square should measure 5cm on a side. The Final Grid will be 25cm long and 20cm wide. 2. Randomly scatter one table spoon of white rice over the grid. 3. Select the three squares and.

Question Rank in size from Largest to smallest Jupiter, The Sun, Spiral Galaxy, Neutron Star, White Dwarf, Black Hole from a supernova, Giant Star, Planetary Nebeula, Cluster of Galaxies, Globular Cluster .

Question (a).How does the position of Polaris in the sky change with your latitude? (b).Does it depend on the time of day or the day of the year? (c).Where in the sky is Polaris to be found when you are on Earth's equator? .

Question Most of the extrasolar planets detected in the first few years had very _______ . A.) low masses (less than the mass of Earth) B.) small orbital eccentricities C.) high masses (greater than 15 Jupiter masses) D.) short periods   .

Question the two planets in the solar system that are the closest to being identical twins are? .

Question Asteriod Ouchi-Gucci hits the earth. As a result of it, the earth's rotation stops and reverses such that the sun now rises in the west and sets in the east. Everything else (length of the day--the 4 seasons) remains the same. Explain what effects you would expect to see on.

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.

Question If you lived on Mars, which planets would exhibit retrograde motion? .

Question the polarization of sunlight is greatest at. A) sunrise B) both sunrise and sunset C) middat D) Sunset Tell why thanks .

Question QUESTION 20 2 points stars where the nuclear fusion of hydrogen still takes place in the core are known as... O Wolf-Rayet stars O protostars O supergiant stars O giant stars O main sequence stars O white dwarfs   .

Question Wouldn't it be possible that Botes Void, a space we generally consider to be "empty" be filled with a number of undetectable dark galaxies?   .

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.

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.

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.

Question If a planet had formed in the asteroid belt, do you think it would have been more like Mars or Jupiter? Justify your answer - .

Question how optical astronomer and radio astronomer map the galaxy   .

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.

Question a) List three major types of meteorites, and describe what each type can tell us about the Earth. b) Which type of meteorite tells us the most about the composition of the solar nebula? Explain why. .

Question The orbit of Mercury around the Sun is an ellipse (a= 0.39 AU and e=0.206). 1. Simulate the orbit of Mercury and calculate the period by treating Mercury and the Sun as a two-body system. 2. Take the general relativity ( FG GMsME/r^2 (1+/r^2 ) ) into account and simulate the precession of the.

Question 3. What are the three conditions a body must satisfy to be called a planet?   .

Question how does metal content vary between older halo stars and young disk stars?   .

Question Rank the following from small to large size: Protoplanetary disk Sun Orbit of Jupiter around Sun Neptune Dwarf planet .

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.

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.

Question which type of volcanic feature is commonly observed on Io, Enceladus and triton?   .

Question Name two important characteristics of each of the four Galilean moons of Jupiter. Which are candidates for microbial life? .

Question If the sun (diameter 864,000 miles) were the size of an NBA basketball (29.5 in), how far away would mercury, venus, earth and mars be? Please explain and show calculations. :-)   .

Question Sunscreens are designed to protect the skin from harmful rays from the sun in the region of 280-400nm. A sunscreen product labeled SPF 15 transmits 7.0% of light at 280 nm. What is the absorbance of sunscreen at 312 nm. A.) 2.00 B.) 1.15 C.) 0.185 D.) None .