What if Venus disappeared?

Venus: Venus is the second planet of the solar system and is commonly hailed as Earth's twin. It's also the second-brightest object in the night sky after the Moon itself. The loss of Venus would not have many cosmological effects, but it would certainly hurt the night sky, as we would lose our “morning star”.

What if Earth and Venus switched places?

If the Earth was pushed inwards to Venus's orbit, then water would start to rapidly evaporate. Like carbon dioxide, water vapour is a greenhouse gas and helps trap heat. The planet's temperature would therefore keep increasing in a runaway cycle until all water had evaporated.

What would happen if the other planets disappeared?

Destruction of planets would take place, because of the sudden loss of the sun's gravitational pull. Planets, including Earth, would begin moving away from their usual paths and could collide with other gigantic bodies, leading to their destruction.

What would happen to Earth if Jupiter disappeared?

There would be minor changes in the planets' orbits about the Sun, but very little else. However, Jupiter does a great job of shepherding and absorbing small objects in the Solar System. With Jupiter gone, the main effect on Earth would be an increase in the rate of impacts from asteroids and other space flotsam.

What if Earth had rings?

At the equator, the rings would appear to divide the sun, casting a dramatic shadow over half the world. Likewise, the rings themselves would cast shadows on Earth.

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What if Jupiter hit Sun?

As Jupiter made its way to the sun, it would disrupt the orbits of all the other planets, and possibly destroy them, as well as the asteroid belt. By the time Jupiter got to the sun, the entire solar system would have become unstable.

What happens if Saturn disappeared?

Saturn's disappearance would affect the orbits of Jupiter and Uranus by some degree, due to its sheer size and mass. However, given its distance from the inner ring of planets, it's tough to imagine that Saturn would have a similar impact on the smaller inner planets.

What if the Sun died?

With no sunlight, photosynthesis would stop, but that would only kill some of the plants—there are some larger trees that can survive for decades without it. Within a few days, however, the temperatures would begin to drop, and any humans left on the planet's surface would die soon after.

What if Mercury hit Venus?

If Mercury were to impact Venus, even if it began by creeping up on it very, very slowly so as to have as little kinetic energy as possible, it would fall into Venus's gravitational well and release gravitational energy enough to melt both bodies.

What if Mars was closer to Earth?

The worst-case scenario would be planet-on-planet impact. With Earth travelling through space at 67,000 miles per hour, and Mars at 53,000, a collision would destroy us both.

Can Venus be cooled?

Venus could also be cooled by placing reflectors in the atmosphere. Reflective balloons floating in the upper atmosphere could create shade.

What if Earth stopped spinning?

At the Equator, the earth's rotational motion is at its fastest, about a thousand miles an hour. If that motion suddenly stopped, the momentum would send things flying eastward. Moving rocks and oceans would trigger earthquakes and tsunamis. The still-moving atmosphere would scour landscapes.

What if moon disappeared?

It is the pull of the Moon's gravity on the Earth that holds our planet in place. Without the Moon stabilising our tilt, it is possible that the Earth's tilt could vary wildly. It would move from no tilt (which means no seasons) to a large tilt (which means extreme weather and even ice ages).

Did Earth have a ring?

Although Earth doesn't have a ring system today, it may have had one in the past. All gas giant planets (Jupiter, Saturn, Uranus and Neptune) in the Solar System have rings, while the terrestrial ones (Mercury, Venus, Earth and Mars) do not. There are two theories about how ring systems develop.

What would happen if Mercury fell into the Sun?

At that point, the simulations predict Mercury will suffer generally one of four fates: it crashes into the Sun, gets ejected from the solar system, it crashes into Venus, or — worst of all — crashes into Earth. To call this catastrophic is a gross understatement. Such an impact would kill all life on our planet.

Can you fuel the Sun?

The only fuel the Sun can use for fusion is in the core, which accounts for only 0.8% of the Sun's volume and 34% of its mass. When it uses up that hydrogen in the core, it'll blow off its outer layers into space and then shrink down into a white dwarf.

What if Neptune hit the Sun?

So if Neptune were thrust so much closer to the Sun, it would warm up very quickly indeed. Over time, the Sun would affect Neptune's atmosphere, as it does Mercury's. Neptune's atmosphere is composed of hydrogen, helium, and trace amounts of methane.

Is Saturn a failed star?

Gas giants are also called failed stars because they contain the same basic elements as a star. Jupiter and Saturn are the gas giants of the Solar System.