Asteroids

That period of time is called a " sidereal day ". That's not the period of time for your clock
or wristwatch to make a complete rotation.

The earth's rotation is 23hours 56minutes and roughly 4seconds.

The asteroid belt is a region of our solar system between Mars and Jupiter, where a conglomeration of numerous rocky and icy planetesimals have formed a ringlike structure that encircles the sun.

One theory is that the gravity of Jupiter was powerful enough to inhibit these rocky bodies from accreting (gathering) into a single planet. As a result, the only body in the belt large enough to qualify as even a minor planet is the dwarf planet Ceres.

It's likely that the vast majority of the non-cometary rocky and icy bodies found in the Kuiper Belt, the Scattered Disk, and the Oort Cloud (all of which are found beyond the orbit of Neptune) probably qualify as either asteroids or minor planets. So it's possible to conceive of these structures as being asteroid belts as well, albeit ones that are not nearly so densely packed as the one in the inner solar system.

The planetoid belts--the Kuiper and the Main--actually have 2 belts each. Their origin is unknown because no model of planetary formation has been proven. The currently accepted model has no explanation for the twinning of Venus-Earth and Uranus-Neptune and has other serious problems with it. Also, a body that is not a planet can't be called a planet, whether dwarf or minor or otherwise.

Generally asteroids move more slowly because they are in relatively stable orbits. Meteors can come in at any velocity, depending on their source. Comets travel very rapidly when close to the Sun, but come almost to a standstill at the outermost point in their orbits.

Meteors from "meteor showers" generally come from the decay of comets, and are traveling at cometary speeds. Recent radar measurements of recent meteor showers tracked the incoming meteors at 130,000 miles per hour.

Giuseppe Piazzi named the first asteroid Ceres after the Roman goddess of agriculture and harvest. He likely chose this name to symbolize the abundance and fertility associated with the goddess, as well as to honor the place where agriculture was highly valued in society.

The general hypothesis is that we will all die. Any remaining humans would have to revert back to a primordial existence.

A 1,000 kilometers, is the distance from Washington NY to Chicago.

The Chicxulub extintion asteroid, which wiped out 99% of life on Earth was a mere 10km.

Yes, there is gravity in the asteroid belt, but it is much weaker than Earth's gravity due to the belt's low mass and spread-out distribution of asteroids. This weaker gravity allows the asteroids to remain in their orbits without being pulled together into a single body.

Most of the asteroids within our solar system can be found within the Asteroid Belt. Located between the orbits of Mars and Jupiter, the Asteroid Belt consists of millions of individual asteroids of varying sizes - from a speck of dust to hundreds of kilometers in diameter. The largest object within the belt is a dwarf planet - Ceres - which has a mass of 9.47x1020kg and a diameter of 476.2km.

It's estimated there are millions of asteroids in our solar system alone. However, the total number of asteroids in the entire universe is uncertain, as new asteroids are constantly being discovered and our understanding of the universe continues to expand.

Several spacecraft are currently orbiting Mars, including NASA's Mars Reconnaissance Orbiter and MAVEN, as well as the ESA's Mars Express. Jupiter is orbited by NASA's Juno spacecraft, which is studying the planet's atmosphere and magnetic field. These spacecraft provide valuable data and observations that help scientists better understand these planets.

The problem with naming a particular asteroid as the one that "comes closer than any other" is that we keep discovering new asteroids flying around that come even CLOSER. At one time, the asteroid "Eros" was the one described as coming closest, but that title may now go to the asteroid Apophis. Apophis will make a very close approach to the Earth on April 13 (Friday the 13th!) 2029, and again on April 13, 2036. The 2029 pass will bring Apophis closer to the Earth than many communications satellites!

The Great Bombardment refers to the heavy and sustained shelling during World War I, particularly on the Western Front. It involved intense artillery barrages aimed at enemy trenches, positions, and infrastructure. The bombardment caused widespread destruction, casualties, and contributed to the brutal and static nature of trench warfare.

A gap is located at an average orbital distance, and asteroid orbits often have large eccentricities.

Edit:

These are the "Kirkwood gaps" and they are caused by the effect of Jupiter's gravity on the asteroids. I've not deleted the previous answer, but I don't think

it helps much.

The gaps are in the distribution of the values of the semi-major axes of the

orbits of asteroids rather than particular places in space.

So orbital eccentricities can't be the explanation.

I think it's simply because asteroids stray into the Kirkwood gaps under various gravitational forces. But these orbits are not stable and asteroids will tend to be cleared away again, eventually.

Yes, spacecrafts have visited both asteroids and comets. Some notable missions include NASA's OSIRIS-REx which visited the asteroid Bennu and JAXA's Hayabusa2 mission which visited the asteroid Ryugu. Additionally, the European Space Agency's Rosetta mission visited and landed on the comet 67P/Churyumov–Gerasimenko.

Yes, asteroids have collided with Earth in the past, resulting in impact craters. However, efforts are underway to improve detection and monitoring of potentially hazardous asteroids to mitigate the risk of future impacts.

Answer 1:

The comet would have to be the size of Mars.

Answer 2:

To literally destroy the entire planet of Earth, breaking it up into fragments, yes, the above answer may be true.

However, any asteroid or comet of 1 kilometer diameter or more would give us serious troubles. And at 5 kilometers wide, would certainly end our civilization, if not quite us. Past that, we would all die, as would all life. Well, most all life bigger than microbes.

The dinosaurs didn't survive because when the meteor hit, there was a bunch of dust and soil that rose out of the earth, causing the sun to block out. All of everything died because the sun wasn't reaching the earth. First the plants died, then the plant eaters, then the meat eaters, see? It totally destroyed the web of life.

There is no definitive evidence of an asteroid hitting Uranus. However, the planet's moons may have been impacted by asteroids in the past, as seen by the presence of impact craters on their surfaces.

Meteorites that fall to Earth are more likely to be rocky and primitive because they can survive the intense heat of entry through the atmosphere. In contrast, most asteroids are carbon-rich because they have not undergone significant heating or melting processes, preserving their original composition. This difference in composition between meteorites and asteroids is largely due to the varying conditions in space that each has experienced.

It would be devastating. A shockwave would blow down everything in about a several hundred mile radius from the impact and a small firestorm would cover a large portion of the earth. Chunks of the asteroid would impact thousands of miles away causing large forest fires. A nuclear winter would occur from all the dust and debris kicked up from the blast and extinguish all plant life. Without plants, herbivores die, and without herbivores, most carnivores would die. The food chain would collapse entirely and there would be worldwide riots as millions die every day.

Thousands of asteroids are being observed; some may come quite close to Earth within the next few hundred years. Right now, no specific date is known, for a specific asteroid to hit Earth.

Thousands of asteroids are being observed; some may come quite close to Earth within the next few hundred years. Right now, no specific date is known, for a specific asteroid to hit Earth.

Thousands of asteroids are being observed; some may come quite close to Earth within the next few hundred years. Right now, no specific date is known, for a specific asteroid to hit Earth.

Thousands of asteroids are being observed; some may come quite close to Earth within the next few hundred years. Right now, no specific date is known, for a specific asteroid to hit Earth.

No, an asteroid cannot physically pass through the Earth due to its solid structure. If an asteroid were to collide with the Earth, it would impact the surface, causing significant damage depending on its size and speed.

Comets and asteroids can potentially impact Earth, causing damage due to the energy released upon impact. They can also bring valuable resources to our planet, such as water and metals. Additionally, dust and gas released by comets passing close to Earth can affect our atmosphere and climate.

• The Paleozoic, Mesozoic, and Cenozoic eras comprise the most recent 10% of Earth's geologic history.
• The Paleozoic era is marked by seven distinct periods. These consisted of dramatic climate changes, multiple life explosions, shifting continents, and new mountain ranges.
• A mass extinction at the end of the Paleozoic era left only 5% of the species on Earth, which made way for the age of the dinosaurs (and lasted 150 million years).
• The Mesozoic era had a warm, stable climate, leading to the development of rain forests and good conditions for dinosaurs.
• The supercontinent Pangaea broke apart during the Mesozoic era. Over millions of years, continents assumed their present-day positions.
• The first mammals appeared during the Mesozoic era.
• Scientists think the extinction of the dinosaurs was most likely caused by several large events such as volcanism and impact from a comet or asteroid

Yes, if a large enough asteroid were to hit Earth, it could lead to dramatic changes in the weather. The impact could release large amounts of dust and debris into the atmosphere, blocking sunlight and potentially causing a "nuclear winter" effect that could drastically alter global weather patterns.

The term, "satellite", applies to virtually every body in the celestial heavens - in other words, nearly everything in space is a satellite.

Any body that revolves around or orbts another is, technically, a satellite. The earth is a satellite to the sun. The moon is the earth's satellite. M

Most of the asteroids revolve around the sun, and therefore, are technically, its satellites.