If the Sun were much smaller than its current size, what effect would this have on eclipses? Learn more on EarthSky. If the Sun were smaller, its apparent size would be smaller than the Moon. For a period of time, it will increase in size hundreds of times over, and shed significant quantities of its mass. An annular eclipse occurs when the Sun and Moon are exactly in line with the Earth, but the apparent size of the Moon is smaller than that of the Sun. - 8978170 Size and Distance. If the moon were appreciably further from Earth than it is, its apparent size in the sky would be smaller than the sun's apparent size, and a total solar eclipse would be impossible. At the current rate that the Moon's orbit is increasing, it will take over 600 million years for the last total eclipse to occur. What would happen if our Sun—as it actually exists, in the present—suddenly decreased in mass, plummeting from 1 solar to mass to a mere .5 solar masses? This is true even at perigee when its disk will be smaller than the Sun's disk even at perihelion. If the moon were appreciably further from Earth than it is, its apparent size in the sky would be smaller than the sun's apparent size, and a total solar eclipse would be impossible. Part 8: What if ... the sun were half as massive? If the sun had half it’s diameter, then it would have 1/4th of it’s current area (and 1/8th its volume, from simple geometry), hence I would estimate we would get 1/4th of the current radiation, hence energy, so it would be like being 4 times as far away from the sun as we are now… that’s about 2/3rds of the way from Mars to Jupiter more or less. How many total eclipses would you expect to see from Earth in a year? Life would be: Nonexistent, at least as we know it. The size of the moon is critical for a solar eclipse, so much so that the very small variation in distance between the Earth and the moon causes qualitatively different types of eclipses. Total solar eclipses would be more common. But it can also burn us. What I'm getting at is size doesn't effect it. About 24. Eclipses occur due to the special coincidence of the moon and the Sun being the same angular size. The sun and moon appear the same size in Earth's sky because the sun's diameter is about 400 times greater - but the sun is also about 400 times farther away. How Big is the Sun? if the size of the new sun is more than sun ,too .then there would be more slope in space and according to 3rd rule of cepler, the earth`s orbit would be bigger if we want to imagine thespeed of turning ,not to change. Suppose the Moon's orbit were not tilted. It's what makes the planets go around it, it's what wakes us up in the morning, and also, it's what the Earth depends on, for sustaining life. This is what allows us the phenomenal beauty of the total solar eclipse. This would increase the odds that the Moon would cover the entire Sun and cause a total solar eclipse. The size of the moon is critical for a solar eclipse, so much so that the very small variation in distance between the Earth and the moon causes qualitatively different types of eclipses. This is a sparsely occupied ring of icy bodies, almost all smaller than … It gives us light so we can see. At its current distance from Earth, if the moon were 80 percent of its current size, there could be no total eclipses—just the annular kind. A complicating factor is that the size of the Sun … Hence the Sun appears as a very bright ring, or annulus , surrounding the dark disk of the Moon. Total solar eclipses would be more common. Red dwarf stars … ... if the sun were hollow, ... putting it as much as 17 times farther from the sun than Neptune and making it easier to be stripped away. Bigger stars are hotter and bluer than the whitish-yellow sun, while smaller stars are cooler and redder. The sun's temperature, color and diameter are determined by its mass. If the Sun were much smaller than its current size, what effect would this have on eclipses? The sun keeps our planet warm enough for living things to thrive. Our solar system extends much farther than the eight planets that orbit the Sun. The apparent size of the moon is almost exactly the same as the apparent size of the sun. 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