The rest of your (short) life.
Without the appropriate survival gear, including unlimited access to oxygen, water, food and survival supplies, you would land on Mars and then die quite quickly.
If you could accelerate steadily and constantly at 1 G for half the trip to Mars and then decelerate steadily at 1G, you could land on Mars in about 1 day, depending on where Mars was in its orbit.Unfortunately, no known spacecraft can accelerate at 1G for more than a few minutes at a time.
We certainly hope not! If Mars were to be disturbed from its orbit to approach the Earth so closely, it would probably destroy the Earth as well. No, Mars will remain in its orbit and the Earth will remain in OUR orbit, and with any luck, the planets will never meet.
Landing on Mars is easy; there are no bodies of water on Mars, it's all solid land. The difficult part is getting there from Earth. It's a long voyage.
Without a spacesuit, airtight building or other breathing apparatus, a human could live for about 3 minutes on Mars. With the right equipment, a human can live indefinitely on Mars.
Mars has no rivers.
For ever!
It's Jupiter that has the long lived storm, not Mars
On Mars the astronaut could hike for thousands of miles and explore incredible canyons and mountains, so he may not be as bored as he would become in a cave. On Mars the astronaut could use solar panels to power all of his equipment for the entire year. On Mars, the communication would be wireless. On Mars there would be sunsets and sunrises and beautiful stars to look at. So the cave experiment ( done several times already ) would not prove how long an astronaut could survive on Mars. On Mars, an astronaut could have robots to help him do things. He could possibly travel by bicycle or on a small electric motorbike. He could probably even explore caves.
Mars is 6,794 km in diameter
A mars day is about a hundred hours!
It May be possible to live ON Mars as they have found Ice. But Probbebly not IN mars.
A senator could serve as long as he wanted in ancient Rome. They were not elected officials as today's senators; they were appointed officials and as long as they met the financial requirement and were of decent moral character, they could remain senators.A senator could serve as long as he wanted in ancient Rome. They were not elected officials as today's senators; they were appointed officials and as long as they met the financial requirement and were of decent moral character, they could remain senators.A senator could serve as long as he wanted in ancient Rome. They were not elected officials as today's senators; they were appointed officials and as long as they met the financial requirement and were of decent moral character, they could remain senators.A senator could serve as long as he wanted in ancient Rome. They were not elected officials as today's senators; they were appointed officials and as long as they met the financial requirement and were of decent moral character, they could remain senators.A senator could serve as long as he wanted in ancient Rome. They were not elected officials as today's senators; they were appointed officials and as long as they met the financial requirement and were of decent moral character, they could remain senators.A senator could serve as long as he wanted in ancient Rome. They were not elected officials as today's senators; they were appointed officials and as long as they met the financial requirement and were of decent moral character, they could remain senators.A senator could serve as long as he wanted in ancient Rome. They were not elected officials as today's senators; they were appointed officials and as long as they met the financial requirement and were of decent moral character, they could remain senators.A senator could serve as long as he wanted in ancient Rome. They were not elected officials as today's senators; they were appointed officials and as long as they met the financial requirement and were of decent moral character, they could remain senators.A senator could serve as long as he wanted in ancient Rome. They were not elected officials as today's senators; they were appointed officials and as long as they met the financial requirement and were of decent moral character, they could remain senators.