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... of spacecraft propulsion will strongly affect the time it would take to reach the other planets. But assuming current methods and the basics of trajectory design it would take about nine months to get to Mars, the nearest planet. To reach Mercury it would take 6 months; Venus, about 9.5 months; Jupiter, about ... the journey time also depends on the route taken. Some unmanned missions have swung by planets en route to give them an extra kick along the way ---- Answer provided by Hazel ...

... during the Mars Rover missions—is for people on Earth to use the new planet time and adjust their days constantly so that they are awake and working at the ... has to assume the time of the other person's planet in order to keep communication open. Space travelers not visiting planets might choose to stay on Earth time, choosing a specific ... no definition for night or day when you are not on the surface of a planet or orbiting. ---- Answer provided by Luke Keller, Ph.D. Image:K2S logosmall.jpg Question and ...

All planets have gravity. The planets larger than Earth have more gravity. ---- Answer provided by Ed Frederick, Ph.D. Image:K2S ... /For%20Kids/KidstoSpace.html Click here Category:Kids To Space Category:Kids To Space - PLANETS

There are probably no more planets in our solar system. There are billions and billions of planets in our galaxy. ---- Answer provided by Ed Frederick, Ph.D. Image:K2S logosmall.jpg Question ... /For%20Kids/KidstoSpace.html Click here Category:Kids To Space Category:Kids To Space - PLANETS

... because scientists are still debating it. There isn't really a good definition of a planet. A planet is a large object orbiting the Sun, and smaller objects orbiting the Sun are ... comets or other things. Some people think Pluto is large enough to be called a planet; some people don't. Pluto is a ball of rock and ice, but that doesn't mean it's not a planet. The Earth is just a ball of rock if you want to think of it ...

... Sumerian tablets dating back to about 4000 BC describe the solar system as having 12 planets, though they could only see six of them. An astronomer in 1860 predicted the existence of a small planet named Vulcan inside the orbit of Mercury—so close to the Sun that we ... it; however, anything is possible. For many years, scientists didn't believe that a tenth planet existed, so who knows how many more there are ---- Answer provided by Robert Peckyno Image ...

... Earth, it would take a matter of days using a standard liquid propellant fuel. Between planets distances are much greater—for instance the Earth and Mars are on average about ... system It would take a spacecraft about nine months to get to Mars. The inner planets such as Mercury and Venus would also take less than a year to reach. The outer planets are much further away and they would take years to reach in a conventional spacecraft ...

Mars is probably the planet that will receive the first visitors from Earth, and it may be the only one ... to go there and return, so it would be a really long vacation Big outer planets like Saturn and Jupiter are balls of gas, so it would not be a good ...

... Earth takes exactly one year, and the dwarf planet Pluto takes 247 years, for example. So the distances from the Earth to any planet are always changing. At its nearest, Mars is ...

... likely okay Since the capability to travel to other planets is not yet available, there is no chance of being marooned on a planet. However, when that capability does become available, one of the priorities will be providing the crew with a means to leave the planet. It will be a low probability. ---- Answer provided by Futron Corporation Image:K2S logosmall.jpg ...

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