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Mars takes longer to orbit the sun than Earth does, so the distance between the two planets varies greatly. Spacecraft can only travel between the two planets when their orbits bring them relatively close together, which occurs roughly every 26 months. The journey from one planet to the other takes about 8 months, so the shortest time you could spend on Mars would be 18 months.

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Q: Why would you have to be on mars for 18 months at a time?
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Why haven't we gone to Mars yet?

Some of the main reasons: - Cost - Lack of public support - Time: It would take to get to and from Mars. Six months to get there, staying there for 18 months(waiting for Mars and the Earth to line up) and six months back. - Physiological problems due to space travel like bone degeneration (from lack of gravity) and radiation exposure that we have not yet resolved. - Psychological effects of prolonged space travel like limited room/ human contact. - Limits of current technology to allow us to carry sufficient supplies (oxygen, water, food) the necessary distance - Lack of appropriate habitat to support astronauts during the time they would have to stay on the planet's surface - No real good reason to go. (Yes, it would be neat, epic even, from an historical standpoint, but Mars itself has not shown to have anything useful to people)


How much would a person weigh on mars planet compared to on earth?

About 2 times less, so if you weigh 50 pounds on Earth, you would weigh about 18(mars is a bit less massive than half the size of earth) on Mars.


When was Biker Mice from Mars created?

Biker Mice from Mars was created on 1993-09-18.


When are Mars and Earth the closest?

Six to seven months for current space probes (2011-2012).Because Earth and Mars have separate and unrelated orbits, the actual closest approach (about 58 million kilometers) only occurs once every few decades. But each year, the Earth comes within 60 to 100 million kilometers of Mars. With current technology (2012), space probes take around 7 months to make the journey to Mars, and usually longer. Any manned mission would probably need to reduce this time well below 6 months each way.


Why are you younger on Mars?

A full year on Mars is about 687 earth days. That is about two earth years. This means that when you are 18 years old on the earth, you would be 9 years old on Mars. However, this doesn't mean that you'd look twice as young as you really are, you'd just have a different age but look exactly the same as you would on the Earth at your age.

Related questions

Why would you have to be on mars for at least 18 months at a time?

A person would need to be on the planet Mars for at least 18 months before they could return home because of the launch window. It would take about 8 months to reach the planet and then another 18 months on the planet until the next launch window to open.


Why would you have to be on mars at least 18 months at a time?

A person would need to be on the planet Mars for at least 18 months before they could return home because of the launch window. It would take about 8 months to reach the planet and then another 18 months on the planet until the next launch window to open.


What is the revolution in mars?

18 months


If it takes 18 months to travel from earth to mars how long would it take to travel from earth to Jupiter?

24 months


How many months in 18 years?

That would be 18 x 12 which is 216 months


What is the time to get to Ceres?

18 months


How much jail time do you serve out of 18 months?

If you are "well-behaved" in prison, then most people are eligible for parole in 75% of the jail time, so it would be 13 and a half months.


Why haven't we gone to Mars yet?

Some of the main reasons: - Cost - Lack of public support - Time: It would take to get to and from Mars. Six months to get there, staying there for 18 months(waiting for Mars and the Earth to line up) and six months back. - Physiological problems due to space travel like bone degeneration (from lack of gravity) and radiation exposure that we have not yet resolved. - Psychological effects of prolonged space travel like limited room/ human contact. - Limits of current technology to allow us to carry sufficient supplies (oxygen, water, food) the necessary distance - Lack of appropriate habitat to support astronauts during the time they would have to stay on the planet's surface - No real good reason to go. (Yes, it would be neat, epic even, from an historical standpoint, but Mars itself has not shown to have anything useful to people)


How much time it will take for pregnancy after marriage?

It can be anywhere from 2-18 months. If nothing has happened in 18 months see a doctor.


What age would heifers calve for the first time?

That really depends on when she was bred. The average gestation period of a cow (or heifer) is around 285 days. Thus, if a heifer was bred when she was 15 months old, then she would likely give birth by the time she is 24 months of age. If she was bred when she was 18 or 20 months old, then she would calve out when she's 27 to 29 months of age.


Im 18 week how many months are you?

Well, you would be 18 weeks pregnant. 14 weeks is the begining of your 2nd trimester so you would be 4 weeks into your second trimester. Or you would be 4 1/2 months along.


What is 18 months in a 2 years as a decimal?

18 months into two years would be expressed a 3/4 of two years.