How big is sun compared to earth ?
600291
The sun is by far the largest object in our solar system. It contains 98% of the solar system's total mass.\n\nIt would take 109 earths to stretch across the sun, and it would take over one million earths to "fill up" the sun if it were hollow.\n\nIf you think of the sun as being the size of a basketball, then the earth would be about the size of the head of a pin.\n\nThe diameter of the Sun is 865,400 mi \nEarth equatorial diameter=7926 mi (12760 km)\nEarth polar diameter=7900 mi (12720 km)\n\nSun's surface area is approximately 12,000 times that of Earth.\n\nMore info:
90131
In reality, the Sun is always the same size! The illusion of difference in what appears to be a difference in size can be explained by, where on the planet you are viewing it from(are you viewing the rising and the setting sun in the East? The west is farther away when you watch it set), the Seasons(distance from the Earth), the angle at which you are viewing it from, atmospheric inconsistancies and plain old Optical illusions. Take your pick or combination of the above.
382741
The sun is the closest star to Earth.
312204
"If the earth were a hundredth of an inch closer to the sun, we would burn to death and if it were one hundredth farther from the sun, we would freeze to death"\n\nHA HA HA HA HA HA LOL ROTFL\n\nThat's what you get for reading fairy tale books instead of science books... actually the earth is at 152 million km from the sun at aphelion and 148 million at perihelion (6 million km closer) ... get a clue!!
108382
As of right now we don't know sizes of other planets outside our solar system.\n\n But, Jupiter is the largest planet in the Solar System. With an equatorial diameter of 143,884 km, (89,405 miles), it is as wide as more than 11 Earths stacked side by side. The planet also has the shortest period of rotation - Jupiter days last just under ten hours.
334251
The sun is not a planet.
401201
Really depends on your definition.  As this is the Astronomy section, I assume you mean in that basis :)\n\nIn roughly 5 billion years, the Sun will run out of Hydrogen in it's core.  As the size of the un is a careful balance between it's Gravitational contraction, and the internal pressure from Nuclear Fusion in the core, the size will go through a series of short (relatively anyway) changes, resulting in a Red Giant.\n\nUsual calculations place the Earth just outside the new surface of the Sun (though some put it inside the sun).  This will scorch the planet of all life, air and water.\n\nAssuming this isn't enough for you, eventually (after a long long time) the sun will contract again  and become a White Dwarf.  This will slowly cool and become a Brown Dwarf, and then Black Dwarf.  The Earth will be a cold, dark, silent lump of rock in the middle of empty space.\n\nHow cheery :)
674138
Very similar to Earth's size.
909859
We have the ability now to measure the orbit of the Earth, and all other planets, to very high precision, and it is not getting closer to the Sun.\n\nYou can do a very rough measurement yourself. If the Earth gets closer to the Sun, the Sun will appear bigger in the sky. Measure it in photographs taken by the same telescope a year apart. \n\nAnother consideration is this. Currently, the Moon and Sun appear the same size in the sky, which produces spectacular total eclipses of the Sun. If the Earth got just a little closer to the Sun, the Moon would no longer be able to completely cover the Sun. So if total solar eclipses continue as usual, that is evidence the Earth is not getting any nearer to the Sun.
637048
the sun is not the largest star in the milky way galaxy. just so you know. there are many more stars larger than it. and in a few billion years, the sun will go supernova, expanding many millions of miles to engulf all of the smaller planets, like mercury and Earth.
70056
The sun. The sun is, on average, 93 million miles from the earth. Pluto orbits the sun over 2 billion miles away. The nearest star is over 4 light years away. (Light travels 186,000 miles, or about 300,000,000 meters, in a second - try figuring out how far that is in a year!) The nearest galaxy is over 4 million light years away - an amazing distance!
348973
The circumference of the earth at the equator is 24,901.55 miles (40,075.16 kilometers).\nBut, if you measure the earth through the poles the circumference is a bit shorter - 24,859.82 miles (40,008 km). This the earth is a tad wider than it is tall, giving it a slight bulge at the equator. This shape is known as an ellipsoid or more properly, geoid (earth-like).
138619
it all depends of what sun and what moon ur talking about the smallest suns in the universe are call red dwarf an are very common in the universe they  are a fifth of our suns size. there is also several gigantic planets as 70 virgins which is 6.6 times bigger than Jupiter so it is highly possible that at least one of those million of gigantic planets may have a moon bigger than a red dwarf
46523
Scientists recently discovered a (presumed) rocky planet orbiting a small red-dwarf star about 25,000 light years from Earth.  The planet is about 5 times larger in diameter than Earth and revolves around its sun about two and a half times further away than does earth.  Because its sun is smaller and cooler and because it rotates further away than does Earth, the average temperature is about -300 degrees and so probably does not harbor life.
426077
The circumference of the earth at the equator is 24,901.55 miles (40,075.16 kilometers).
652664
The length of the earth's orbit (orbital circumference) is 924,375,700 kilometres according to wikipedia.
923222
The smallest anything can be is called Plank length and it is approximately 1.6 × 10 (to the -35th power) meters.  \nAssuming "we" is the earth, we are very small compared to the size of the universe.  The "volume" of the observable universe is about  1.9 × 10 (to the 33rd power) light years, and the earth has a volume of approximately 8.2 x 10 (to the 12th power) miles, or 4 x 10 (to the -26 power) of a light year.  The universe, then, is about 4.7 x 10 (to the 58th power) times bigger than the earth.