Sign up here. Supporting users have an ad free experience! Flashcard Library Browse Search Browse. Create Account. Details Title Stellar Astronomy Test 2 Description Includes chapters Key terms, key concepts, questions from in-class quizzes, and questions from homework assignments. Additional Astronomy Flashcards.
Term The light we see from the Sun comes from which layer? A troposphere B ionosphere C corona D chromosphere E photosphere. Definition Correct Answer s : E. Term Why couldn't you stand on the Sun's surface? A You could stand on it, if a sufficiently protective spacesuit could be designed. B The Sun's surface is too highly magnetized for anything to survive there.
C The Sun doesn't have a solid surface. D You could stand on the surface. E The Sun has no surface at all Definition Correct Answer s : C. Term What is the net result of the proton-proton chain? Definition Correct Answer s : D. Term The pattern of rising hot gas cells all over the photosphere is called: A granulation. B filaments. C sunspots. D convective projections. E prominences. Definition Correct Answer s : A. Term When the chromosphere can be seen during a solar eclipse, it appears: A violet.
B invisible. C red. D blue. E yellow. Term The absolute magnitude of a star is its brightness as seen from a distance of: A one million kilometers. But if you take a look around, there's nothing here for you to actually land on, because the sun doesn't have any solid surface to speak of. It's just a giant ball of hydrogen and helium gas.
So instead of landing on the photosphere, you're going to sink into it. One of the biggest dangers in the photosphere comes from these enormous black spots you can see as you look around. These are called sunspots. They're cooler regions of gas, some as large as the entire Earth. The sunspots are produced by powerful magnetic fields coming from inside the sun, which, on one hand, would fry your electronics, but more importantly, where a sunspot forms, a solar flare often follows.
That's when magnetic fields and superhot gas violently erupt from the surface, releasing as much energy as 10 billion hydrogen bombs. So let's steer clear of those active regions and make our way to the sun's interior. Just beneath the surface is the convective zone.
Here, temperatures reach 2 million degrees Celsius. That's hotter than your heat shield was designed to handle. In fact, there's no material on Earth that could withstand this heat. The best we've got is a compound called tantalum carbide, which can handle about 4, degrees Celsius max. On Earth, we use it to coat jet-engine blades.
So even if we made it this far, we couldn't actually survive down here. But for curiosity's sake, let's keep going. At , kilometers down, we hit the radiative zone.
This is the thickest layer of the sun. It makes up almost half of the entire radius, so we'll be spending some time here, which isn't great, because the pressure is at least million times greater than at sea level on Earth. Its name comes from the Greek root chroma meaning color , for it appears bright red when viewed during a solar eclipse. A thin transition region, where temperatures rise sharply, separates the chromosphere from the vast corona above. The uppermost portion of the Sun's atmosphere is called the corona, and is surprisingly much hotter than the Sun's surface photosphere!
The upper corona gradually turns into the solar wind, a flow of plasma that moves outward through our solar system into interstellar space. The solar wind is, in a sense, just an extension of the Sun's atmosphere that engulfs all of the planets. Earth actually orbits within the atmosphere of a star! Skip to main content. Regions of the Sun.
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