I heard that there is a satlite of  jupiter similar to planet like earth?
828073
Not really "similar".  The same gravitational forces that cause tides on Earth are at work on the four largest moons of Jupiter, but on much larger scales.  Earth is small - our gravity only raises the tides a few feet.  The Jovian moons are pulled and tugged bu the immense gravity of Jupiter, heating the cores to immense temperatures (kind of like bending a paperclip back in forth - before it breaks, it gets very hot).\n\nThe innermost satellite Io gets so hot its entire core is liquid magma.  Io is constantly erupting, many hundreds of times a day.  The next planet, Europa, is a frozen world on the outside.  But because it is also heated internally, there is speculation that there is a massive liquid ocean under the ice, several miles thick.  If true, that would mean there's more liquid water on Europa than there is on Earth.  Liquid water is essential to life as we know it - and there are plenty of organic compounds and material out in space.  Given water, heat, and organic compounds, there is the distinct possibility for life.  But we won't know until we actually go there and drill into the topmost ice.\n\nGanymede is further out, and experiences less tidal force.  Although there may be a liquid ocean under the ice there too, the ice is much thicker and it's estimated that the "ocean" may really be a mixture of icy sludge.  The outermost moon, Callisto, is probably just a solid ice ball.
542914
There are two ways to answer your question - \n\nThe orbit of Venus is closest to the orbit of Earth.\n\nHowever, depending on the current positions of the planets in their relative orbits... Mars or Mercury could be closest to Earth.\n\nToday, it appears that Venus is the closest planet.\n\nTwo months from now, Mercury will be the closest planet to Earth.\n\nSee the attached link for a pretty nifty orbit simulator from the NASA /JPL website.
838305
B is wrong.  Jupiter spins once every 9 hours and 55 minutes while earth spins once every 24.
331811
I have a guess, what yous saw was planet Jupiter.  No, Venus can not be seen exactly between East and West in the middle of the night.
191019
http://nssdc.gsfc.nasa.gov/planetary/factsheet/jupiterfact.html
1112285
Absolutely.  There's evidence that planets with attributes similar to Earth exist.  In fact, scientists recently sighted a planet in a star system close to us that seems very similar to Earth.  Now UFO's are a bit more dubious, but then humanity has only been around for 20.000 years (maybe 50,000, depending on who you believe), while the universe has been around for at least nine billion years, and maybe up to seventeen billion (though I think that's probably stretching it a bit).  I would say there's been more than ample time for more advanced lifeforms to appear in that timeframe.
249386
Yes, I do believe that life does exist in the universe on other planets. its doesnt mean that life is there only on Earth n in our solar system of the STAR SUN.\nIf u c there r millions of stars in the universe and triliions of planets so there is a possibility to find a planet similar or exact as EARTH which has the same atmosphere or maybe the same gravitational field or perhaps the same solar system is repeated somewhere in the universe. Thanx\n\n\nLuqman Cheema\nIslamabad, Pakistan
615320
No way, there must be many, many planets throughout the universe that are similar to our own and support life. There are probably many others that support life that is much different than we are accustomed to also.
586639
With over sixty three moons to date and growing, Jupiter has more moons than any other planet in the Solar system*.  In fact, Jupiter and its moons are often referred to as the Jovian system (Jove being an alternate name for Jupiter), and are almost more complex as a planetary system than the Solar system itself is.\n\nThe planet with the second most numerous moons is the planet Saturn.  If you would like more information on either the moons of Jupiter or Saturn, I would highly recommend searching through either nasa.gov, nineplanets.org (which can be a little dry but still has a lot of useful information), or solarviews.com.\n\n\n*By the way, there's only one "Solar system" since the name refers to the star in the center of our star system, which is properly named "Sol", and not "the Sun"... all other systems containing a star and planets would be properly referred to as either a planetary system or a star system, as they do not orbit the star Sol.
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.
623067
Yes, Earth is the third planet from the sun.\n\nNo, Earth is not an exact sphere.  The Earth ispudgy.  It has a slight "bulge" around the Equator.  We're close enough, and we're certainly not flat, but we're not on a perfectly round planet.\n\nThe planets in the solar system are (in order from sun, outwards):\n\nMercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, & Pluto.  There is also an arguable "10th planet", but until NASA names it (and confirms it's a PLANET, not just a rock) I'll say there's nine.\n\nAlso, in between Mars & Jupiter is the Astroid Belt, which some think was once a planet that exploded long ago.\n\nFor (really) in-depth information, visit Wikipedia:
62444
With no solid surface for either of these planets, an 'earth'quake would not happen in the traditional sense.  I am sure that there must be some incredible turbulence throughout the entire fluidic interior of the planets, and especial with Jupiter, the core may be solid and made up of metallic hydrogen.  I expect when comet Schumaker-Levy 9 slammed in to Jupiter, it must have set of some tremendous shock waves, but the planet aborbed it with barely a flinch.
862227
Jupiter is the largest planet in our solar system. It is also one of the brighter objects in the night sky. No one knows for sure who discovered Jupiter, but we know the ancient Greeks named him after the god, Zeus. \n\nThe most prominent feature of Jupiter is the Great Red Spot. This violent storm has been observed from Earth since the 1600's. But it wasn't until the 1930's that we knew what Jupiter was made of. Astronomer Rupert Wildt researched the planet and found the atmosphere is mostly hydrogen and helium. \n\nBeginning in 1973, the United States sent four spacecraft to observe this massive planet. Pioneer 10 and 11, along with Voyager I and II, sailed past Jupiter. They gathered many images that we still see today. \n\nJupiter's moons are interesting too! Galileo discovered four of the larger moons: Io, Europa, Ganymede and Callisto in 1610. Most of the other moons were found by the Voyager spacecraft during its flyby. The Jupiter system is almost like a little solar system. Astronomers may continue to discover even more moons as more powerful telescopes become available.
602001
Probably not. The Solar system is a system in balance. The Sun's gravity keeps the orbits of the planets stable. Gravitational attraction between the planets also effects their orbits, exerting the same force as the Moon exerts on the Earth's oceans. The gas giants, especially Jupiter can\ncreate "tides" that can tear a smaller planet to pieces, over time. There once was a "theory" that the asteroid belt, between Mars and Jupiter, consists of pieces of a planet called, I believe, Vulcan. If Mars WASN'T there, the\nearth would probably be located farther out from the Sun.\nVulcan might not have broken up, and would be orbiting a little closer to the Sun, but not as close as Mars. Bottom line: Earth, outside the "comfort zone" would probably be TOO COLD to sustain life.\n\nMoral of the story? Things are the way they are for a reason.
57986
if it is extemely bright, then it is most likely the planet Jupiter. The moon moves a lot each day, so you need to say exactly what day and time you saw it.
470041
Maybe not right now, but it should be visible in the northern sky with binoculars over the next few weeks. It's in the constellation Corona Borealis, which puts it north of Jupiter. Jupiter is rising in the sky just before 10pm at the moment. \n\nIt's moving towards the Northern Triangle - close to Vega in Cygnus around May 7/8 and then below Deneb around May 12, and that, apparently, is it's closest pass to Earth. It may brighten to mag 5 or even mag 4 at this time, so you might even be able to see it without binoculars! Fingers crossed!\n\nIf you want to look, try to find a fuzzy indistinct object in your binoculars. That's the best giveway. Sometimes comets don't show a tail. \n\nThe following web-link is very useful I think. I will be out looking during the next few nights myself.
781419
I'm sure that information is available on one of the NASA sites, I don't have time to look for it right now.  The gravity of Jupiter has been approximated as 2.5 times the gravity of Earth, but the mass of Jupiter is almost 318 times that of the Earth.  For some reason, I was under the impression that mass and gravity were a direct proportion.  I just found that I was wrong today.  Thanks for asking your question; I just became even smarter that I was.