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# What would happen if the planets were closer to Earth?

## What would happen if the planets were closer to Earth?

If big planets like Jupiter were close to Earth, it would lead to volcanic destruction. If Jupiter, Saturn, Uranus, or Neptune appeared in the moon’s place, Earth itself would become one of that planet’s moons.

### How does a spacecraft get from Earth to another planet?

12. How long does it take spacecraft to get to each planet? When we send spacecraft to planets or other objects (asteroid or comet), the spacecraft is actually put into an orbit around the Sun in order to bring it close to the target planet. But, you have to deal with the gravity of the Sun.

#### What might happen to a planet that gets very close to the Sun Why?

The closer a planet is to the Sun, the less time it takes for it to go around the Sun. It takes less time because the length of the orbit is shorter (a smaller orbit), but it also moves faster in its orbit. Thanks to gravity, it has to move faster in its orbit to stay in orbit!

What type of spacecraft would be used to pass close by all the planets in our solar system in order to gain information about the planets?

Voyager 1 successfully flew by both the Jupiter and Saturn systems before continuing out into the farthest most reaches of our solar system. Voyager 2 is the only spacecraft to study all four of the solar system’s giant planets at close range.

Which plant is nearest to the Earth?

Venus is not Earth’s closest neighbor. Calculations and simulations confirm that on average, Mercury is the nearest planet to Earth—and to every other planet in the solar system.

## How much fuel is needed for Mars and back?

The “gear-ratio” for Mars is 226:1, meaning every kilogram of material you send requires a rocket to burn 225 kilograms of fuel. That’s true for any material — water, food, scientific equipment, people, and even reserve fuel for the return trip.

### What happens if Earth was close to the Sun?

The closer you are to the sun, the hotter the climate. Even a small move closer to the sun could have a huge impact. That’s because warming would cause glaciers to melt, raising sea levels and flooding most of the planet. Without land to absorb some of the sun’s heat, temperatures on Earth would continue to rise.

#### Will we ever travel outside our solar system?

The technology required to travel between galaxies is far beyond humanity’s present capabilities, and currently only the subject of speculation, hypothesis, and science fiction. However, theoretically speaking, there is nothing to conclusively indicate that intergalactic travel is impossible.

How is a spacecraft powered by the Sun?

Spacecraft traveling far away from the Sun have very large solar panels to get the electricity they need. For example, NASA’s Juno spacecraft uses solar power all the way out at Jupiter, where it orbits the planet. Each of Juno’s three solar arrays is 30 feet (9 meters) long! NASA’s Juno spacecraft is powered by very large solar arrays.

What happens when a spacecraft comes back to Earth?

Once you’ve done that, then you would get out of your spacecraft, or attach your spacecraft to a lift, and just slowly travel down the elevator at, say, 200 mph, or whatever speed you find comfortable and safe, until you reach the Earth’s surface. You’d feel gravity gradually increase from zero g to full g as you descend.

## Which is the next spacecraft to leave our Solar System?

Voyager 2 likely will be next. Both spacecraft, launched in 1977, are still in contact with NASA’s Deep Space Network. NASA’s New Horizons, which flew past Pluto in 2015 and is currently exploring the Kuiper Belt beyond Neptune, will eventually leave our solar system. As will the now inactive Pioneer 10 and 11 spacecraft.

### Why does solar power not work on spacecraft?

However, solar power doesn’t work for all spacecraft. One reason is that as spacecraft travel farther from the Sun, solar power becomes less efficient. Solar-powered explorers may also be limited by a planet’s weather and seasons, and harsh radiation (a type of energy).