Physics

Physics, 31.07.2019 14:50, WritingStar1313

Aplot of surface temperatures of stars against their absolute magnitude is called

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Physics, 24.06.2019 07:30, naomirice24

How does the sun compare to other stars in terms of surface temperature, apparent magnitude, absolute magnitude , and size

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Physics, 11.07.2019 00:30, khikhi1705

An astronomer named william herschel was one of the first people to try and map the structure of our galaxy in 1785 (believed to be the entire universe at that time). he did this by assuming that all stars had the same absolute magnitude and then counted how many stars he could see in each direction on the sky. he put this together to draw*a map of our galaxy suppose that you are a modern william herschel and you are looking at a visual ccd image. this ccd image has a field of view of 10 arcminutes by 10 arcminutes. now a few assumptions: o all stars have the same absolute magnitude as the sun (4.8) the density of stars is uniform (assume one star per 25 pe3) assume that this ccd image has an exposure time that allows you to see stars with apparent magnitudes of 20 and brighter (a) how far away is the most distant star you see? b) how many stars with magnitude between 19 and 20 do you expect to see in your image? c) how many stars with magnitude between 13 and 14 do you expect to see in your image? (d) make a plot of the luminosity function φ(m) vs m, so that φ(m) shows the number of stars in the frame with magnitude between m an

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Biology, 19.07.2019 21:00, nell1234565

1. the mass of a star can be determined by a. the wavelength of light emitted by the star. b. the color of the star. c. the distance between the star and earth d. binary star systems 2. a light-year is a. 9.5 trillion kilometers b. 95 trillion kilometers c. 150 million kilometers d. 150 billion kilometers 3. the difference in the brightness of two stars with the same surface temperature is attributable to their a. densities b. colors c. ages d. sizes 4. a hertzprung-russell (h-r) diagram shows the relationship between a. absolute magnitude and apparent magnitude b. temperature and absolute magnitude c. parallax and temperature d. apparent magnitude and parallax 5. which main-sequence stars are the most massive? a. red b. orange c. yellow d. blue 6.

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Geography, 04.10.2019 21:30, nikki319

Aplot of the continuous spectra of five different stars is shown in the figure below. based on these spectra, which of the stars has the most absolute infra red emission?

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