- What would happen if the moon was twice as big?
- Can Earth survive without the moon?
- What would happen if the moon disappeared?
- What if the earth was 2x bigger?
- What happens if the moon is red?
- What would happen if the Earth stopped spinning for 42 seconds?
- Why we Cannot see other side Moon?
- How close was the moon in the past?
- How cold is it in space?
- Do we need the moon?
- What did ancients think of the moon?
- Does our view of the moon ever change?
- What two planets have no moons?
- Can we pull the moon closer?
- Is the American flag still on the moon?
- What is causing the moon to move away from Earth?
- What would happen if the moon was heavier?
- Why is only one side of the moon visible to the US?
What would happen if the moon was twice as big?
First, the moon gets twice as big without getting heavier.
If it did this, it would collapse violently under its own gravity.
The resulting bounce-back would fling huge chunks of moon in our direction.
Even one such rock, say something 10 miles across, might wipe us out..
Can Earth survive without the moon?
2. Without the moon, a day on earth would only last six to twelve hours. There could be more than a thousand days in one year! That’s because the Earth’s rotation slows down over time thanks to the gravitational force — or pull of the moon — and without it, days would go by in a blink.
What would happen if the moon disappeared?
A missing moon could cause even more disruptive changes, although on a much longer time scale. Without the moon’s gravity holding the Earth in place, the tilt of our home planet’s axis would probably shift drastically over time. … It has no large, stabilizing moon to stop it.
What if the earth was 2x bigger?
If Earth were twice its size, you’d be heavier, because the force of gravity increases as the planet’s density and radius increase. … The iron core and liquid mantle would also be 10 times larger, and with more gravity acting on a larger mass, the pressure beneath Earth’s surface would increase.
What happens if the moon is red?
The air molecules from Earth’s atmosphere scatter out most of the blue light. The remaining light reflects onto the Moon’s surface with a red glow, making the Moon appear red in the night sky. The name “blood moon” is also sometimes used for a Moon that appears reddish because of dust, smoke or haze in the sky.
What would happen if the Earth stopped spinning for 42 seconds?
If the Earth stopped spinning suddenly, the atmosphere would still be in motion with the Earth’s original 1100 mile per hour rotation speed at the equator. All of the land masses would be scoured clean of anything not attached to bedrock.
Why we Cannot see other side Moon?
First, the dark side isn’t really any darker than the near side. Like Earth, it gets plenty of sunlight. We don’t see the far side because “the moon is tidally locked to the Earth,” said John Keller, deputy project scientist for NASA’s Lunar Reconnaissance Orbiter project.
How close was the moon in the past?
The Moon formed (probably as a result of a titanic collision between Earth and a Mars-size protoplanet) 4.5 billion years ago. At the time of formation it was about 4 Earth-radii distant—that is, it was orbiting about 15,000–20,000 miles away, as opposed to the current average distance of 238,000 miles.
How cold is it in space?
Hot things move quickly, cold things very slowly. If atoms come to a complete stop, they are at absolute zero. Space is just above that, at an average temperature of 2.7 Kelvin (about minus 455 degrees Fahrenheit).
Do we need the moon?
Without that moon to slow us down, we’d have much more severe weather. It stabilizes the Earth’s rotation on its axis. It’s possible that the Earth might have rolled over on its axis on a regular basis, causing a complete redistribution of the Earth’s water.
What did ancients think of the moon?
Through persistent observation, Anaxagoras came to believe that the moon was a rock, not totally unlike the Earth, and he even described mountains on the lunar surface. The sun, he thought, was a burning rock.
Does our view of the moon ever change?
Our perspective of the Moon’s sunlit appearance changes as it orbits Earth. Different countries see different phases of the Moon on the same day.
What two planets have no moons?
Of the terrestrial (rocky) planets of the inner solar system, neither Mercury nor Venus have any moons at all, Earth has one and Mars has its two small moons. In the outer solar system, the gas giants Jupiter and Saturn and the ice giants Uranus and Neptune have dozens of moons.
Can we pull the moon closer?
The Moon will swing ever closer to Earth until it reaches a point 11,470 miles (18,470 kilometers) above our planet, a point termed the Roche limit. “Reaching the Roche limit means that the gravity holding it [the Moon] together is weaker than the tidal forces acting to pull it apart,” Willson said.
Is the American flag still on the moon?
Images taken by a Nasa spacecraft show that the American flags planted in the Moon’s soil by Apollo astronauts are mostly still standing. LRO was designed to produce the most detailed maps yet of the lunar surface. …
What is causing the moon to move away from Earth?
The migration of the Moon away from the Earth is mainly due to the action of the Earth’s tides. The Moon is kept in orbit by the gravitational force that the Earth exerts on it, but the Moon also exerts a gravitational force on our planet and this causes the movement of the Earth’s oceans to form a tidal bulge.
What would happen if the moon was heavier?
(And with a smaller moon, we might be less stable than we are.) But a bigger moon probably wouldn’t affect Earth’s stability much, Siegler said. It would make the planet’s tilt harder to change, which would mean a more stable climate, which “just means maybe ice ages wouldn’t happen as often,” he told me.
Why is only one side of the moon visible to the US?
One side of the moon always faces Earth because of what’s called synchronous rotation. … Because of synchronous rotation or tidal locking, our moon rotates on its axis in the same period that it revolves around the Earth: 27.32 days.