/kloc-major astronomical events around 0/995? Like an asteroid hitting the earth?

1On March 24th, 993, American astronomers Eugene Sumek and Caroline Sumek and astronomy enthusiast David Levi discovered a comet with the 46 cm telescope of the Paloma Observatory in California, and named it comet Sumek-Levi 9 after their surnames. A year and more than two months after its discovery, this comet split into 2 1 fragments from July 6 to 22, 1994/kloc-0. The largest one was about 4 kilometers wide and was thrown at Jupiter at a speed of 60 kilometers per second. The collision between comet and Jupiter excited scientists. This is the first large-scale celestial collision observed by humans since the invention of the telescope, even before the invention of the telescope. Scientists have calculated that in the solar system, astronomical wonders such as the collision of comets with trees only occur once every several million years or even tens of millions of years, which provides a golden opportunity for human beings to understand the mysteries of the universe more deeply and reveal the origin and evolution of life on earth.

According to the calculation of the orbit of comet Shoemaker-Levi 9, this comet once traveled to a position only 40,000 kilometers away from Jupiter's surface on July 8, 1992/kloc-0. Due to the influence of Jupiter's gravity, the comet nucleus is broken into 2 1 reflective fragments, which looks like a string of dazzling pearls hanging in the vast universe from a distance.

Astronomers speculate that this comet has been orbiting Jupiter for more than a century, and it has not been discovered for a long time because it is too far away from the earth and its brightness is too dim. At that time, it was speculated that there was a comet belt composed of billions of comets outside the solar system. Due to the gravitational perturbation caused by passing stars, some comets break away from the comet belt and enter the solar system from time to time. Some comets just pass through the solar system like passers-by and then return to outer space, while others are sucked into the orbit of the solar system for periodic operation like Halley's comet. Comet Shoemaker-Levi 9 is an "uninvited guest" captured by Jupiter's orbit.

The impact point of this comet's collision with wood is just in the back shadow relative to the earth, so people can't directly observe the impact on the earth. But there are 16 satellites and two dim rings around Jupiter, and scientists can observe the reflection effect of the impact on Jupiter's satellites and rings. In addition, Jupiter's rotation period is 9 hours and 56 minutes, and many impact points can move to the position facing the earth with Jupiter's rapid rotation, so that human beings can observe the mushroom-like smoke clouds after impact every 20 minutes or so.

Maybe not the earth. I am absolutely sure of what I heard when I was a child, but the fact is very strange, and I will remember it wrong. Here's the thing:

1994

Comet Shoemaker Levi 9 hits Jupiter.

The first fragment of comet Shoemaker-Levi-9 containing rocks and ice fragments crashed into Jupiter's atmosphere at the speed of 2 15 km per hour at 20: 00 GMT on July 65, 438+06, releasing energy equivalent to 200 billion tons of TNT. After the impact, many fireballs stretched for nearly 1000 km, emitting strong light. Through the astronomical telescope, scientists saw a wide dust cloud rising on the surface of Jupiter, and the high-temperature gas went straight to the height of 1000 km, leaving an impact mark on Jupiter as big as the earth. Some time before the comet collision, the strong electromagnetic wave emitted by Jupiter was 9 times stronger than usual, and the temperature of the splash point instantly rose to tens of thousands of degrees Celsius.

Because the collision between comets and trees takes place in space 800 million kilometers away from the earth, it will not bring disaster to the earth and the solar system.