# How big of an asteroid would it take to destroy the Earth?

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NASA scientists say it would take an asteroid 60 miles (96 kilometer) wide to totally wipe out life on Earth.

## How big would an asteroid have to be to cause extinction?

Ultimately, scientists estimate that an asteroid would have to be about 96 km (60 miles) wide to completely and utterly wipe out life on our planet.

## How big of an asteroid would destroy a city?

If an asteroid the size of an apartment hits Earth, this blow could possibly destroy a small city. If an asteroid the size of a 20-storey building hits Earth, this blow can completely flatten a small country.

## Can an asteroid destroy Earth?

If an asteroid breaks into fragments, any fragment larger than 35 meters across would not burn up in the atmosphere and itself could impact Earth.

## How big is the asteroid that might hit Earth?

The asteroid 4660 Nereus, discovered in 1982, is classified as a “potential hazardous asteroid” by NASA due to its size and how close it approaches Earth. At approximately 1,083 feet, it is 20 feet taller than the Eiffel Tower.

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## What if a 1 mile wide asteroid hit Earth?

If a mile-wide asteroid hit Earth, it would strike the planet’s surface at about 30,000 miles per hour (48,280 kilometers per hour). An asteroid that big traveling at that speed has the energy roughly equal to a 1 million megaton bomb. … For an asteroid to wipe out most everything on Earth, it would have to be massive.

## Is a planet killer possible?

By May 6, 2013 (April 15, 2013, observation arc), the probability of an impact on April 13, 2036, had been eliminated altogether. Apophis will make two modestly close approaches to Earth in 2036, but even the planet Venus will come closer to Earth in 2036.

99942 Apophis.

Discovery
Absolute magnitude (H) 19.7±0.4 19.09±0.19 18.95±0.15

## How big was asteroid that killed dinosaurs?

The asteroid was about 7.5 miles (12 kilometers) in diameter and was traveling about 27,000 mph (43,000 km/h) when it created a 124-mile-wide (200 km) scar on the planet’s surface, said Sean Gulick, a research professor at the University of Texas Institute for Geophysics, who led the study.

## What happens if an asteroid hits the moon?

If the 400-meter-wide asteroid were to impact the moon, it would kick up enough dust — and that dust would moving at a high enough speed — for a small quantity to escape the moon’s gravity and coast all the way to Earth, 240,000 miles away, Yeomans said.

## What would happen if a 5 km asteroid hit Earth?

If an asteroid or comet with the diameter of about 5 km (3.1 mi) or more were to hit in a large deep body of water or explode before hitting the surface, there would still be an enormous amount of debris ejected into the atmosphere.

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## How would NASA stop an asteroid?

The asteroid would eject a stream of material that would act as a rocket, diverting the asteroid away from a collision course with the Earth. Of course, for any method of diverting an asteroid to work, scientists must track Earth-approaching asteroids that could cause an extinction-level event.

## How likely is Earth to get hit by an asteroid?

Asteroids with a 1 km (0.62 mi) diameter strike Earth every 500,000 years on average. Large collisions – with 5 km (3 mi) objects – happen approximately once every twenty million years.

## Can a comet destroy the world?

It is humanity’s worst nightmare: a comet five kilometres wide will collide with Earth and wipe out almost everything that lives and breathes – including us. … While the Hollywood treatment may make the scenario seem fanciful, a devastating impact that destroys most life on Earth has already happened.

## How do you survive an asteroid?

Keep a stash of non-perishable food items and enough water to last you for a long time. Depending on the severity of the impact, you could be stuck in there for several years. The dust and debris from the impact would likely trigger a nuclear winter, killing off any crops in the blast area.

## Is there a comet coming in 2022?

Bottom line: A new comet named C/2021 O3 (PanSTARRS) will visit the sun and be closest to Earth in the spring of 2022. It might become visible to the unaided eye.

## What would happen if the moon hit the Earth?

With the Moon coming closer, Earth’s rotation would speed up. Our days would become shorter and shorter. Global temperatures would go down, nobody would worry about climate change anymore. Unless asteroids burned the Earth to a crisp.

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