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What is the simplest way to prove that Earth orbits the Sun? 17 Apr 2015 · Assume you're talking to someone ignorant of the basic facts of astronomy. How would you prove to them that Earth orbits the Sun? Similarly, how would you prove to them that the …
How does the Sun's gravity affect our weight? 17 Jun 2025 · The logic of the answer seems wrong to me as well. It's describing exactly the situation present in tidal forces, but it's coming coming to the wrong conclusion; it is well known that the …
How much lux does the Sun emit? - Physics Stack Exchange I want to know how much lux the sun emits on a bright day - I don't mean when one stares directly at the sun, but rather when one walks casually outside when the sun is shinning brightly. Now the
Can Jupiter be ignited? - Physics Stack Exchange Our solar system itself contains two candidate "Earths" One is Jupiter's moon Europa and another is Saturn's moon Titan. Both of them have the problem of having at low temperature as Sun's heat ca...
What is actually meant by 'sun set' and 'sun rise' times, when taking ... 15 Feb 2017 · If this is the case, then when we read things like what time sun sets and rises on websites, books, calendars, other official times, et al… does that mean when we see for example …
Is a 1 cm thick obsidian glass plate safe to see the Sun direcly? 25 Mar 2019 · For a good starter resource on eye safety for seeing the Sun, see e.g. this AAS eclipse-viewing resource. Use only certified Sun-viewing eyeglasses, or welding glasses of …
sun - Nuclear fusion - Hydrogen isotopes - Physics Stack Exchange What is the isotope composition of hydrogen atoms in the sun? Are the ratios of protium:deuterium:tritium similar to those we find on earth? What does the nuclear fusion of …
temperature - How does water evaporate if it doesn't boil? - Physics ... I don't the the rate of evaporation depends upon the temperature of the overlying air, i.e. it is a function of the thermodynamic processes withing the liquid (or solid, like in ann's example). Water …
Why does sunlight have low entropy? - Physics Stack Exchange 8 Jan 2024 · 6 At the sun's surface, sunlight is similar to black body radiation at the sun's surface temperature. Thus, if you brought a surface next to the sun's surface, it would be able to heat up …
How hot can metal get in sunlight? - Physics Stack Exchange 31 May 2015 · I quite liked this one [archived] describing measurements on cars. It shows that things left in the sun can get significantly hotter than the surrounding air (although there are some issues …