The solar sphere as observed by STEREO and the Solar Dynamics Observatory on January 31, 2011. It represents the sun, source of energy, and reflected the energy theme of the fair. The Surface Of The Sun, The Photosphere And Electrically Driven Solar Flares. The Knoxville Sunsphere was the theme structure for the 1982 World's Fair. (Hint: The formula for the surface area of a sphere is 4\pi r^{2} ) answer should be _____m^2 2. The Sun is almost a perfect sphere. This is a very vauge question as it could refer to anything from the surface of the sun, to the Earth, to many things beyond the sun. Good question, and the answer is the same for all the planets which have been “fluid” at some point in their evolution. What Is the Sun Made Of? Considering the sheer size of the Sun, there is only a 10 km difference in its polar and equatorial diameters – this makes it the closest thing to a perfect sphere observed in nature. 1. Our Sun rotates slowly, so it’s almost a perfect sphere, but there are stars out there that spin very, very quickly. The atmosphere of the sun is composed of several layers, mainly the photosphere, the chromosphere and the corona. NASA's Solar Dynamics Observatory saw sunspot AR 1520 before the solar flare erupted from it on July 12, 2012. Because the STEREO separation was still slightly less than 180o at that time, a narrow gap on the far side of the Sun has been interpolated to simulate the full 360o view. The spokesman for the first circle of twelve wise spirits in the solar sphere is Thomas Aquinas (1225-74), who was canonized in 1323 and given the title Doctor Angelicus ("Angelic Doctor") by Pope Pius V in 1567. Stars are similar. Shares. Imagine a giant sphere surrounding the Sun with a radius of 1 AU. By Tim Sharp 04 November 2017. Well, it really depends in what way you interpret the question, the sun is really big and similar celestial bodies can be detected light years away (to my understanding). What is the surface area of this sphere, in square meters? This problem leads you through the calculation and discussion of how much solar power can be collected by solar cells on Earth. The Sun is travelling at 220 km per second. The University of Leicester has been kind enough to produce an excellent two minute video that describes the Birkeland cathode solar model that is described on this website. Assuming that you are talking about the Sun's sphere of influence in Galactic frame of reference, the formula would be (very roughly assuming that the rest of Galaxy concentrated in the core and the Sun's orbit circular): rsoi = a sun * (m sun / m Gal) ^ (2/5) = 2.5×10^17 km * ( 1 / 7.0×10^11 ) ^ (2/5) = 4.57×10^12 km, or 30,547 AU,

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