Named after British astrophysicist Edmund Halley, the Halley Comet is one of the most famous comets in the history of astronomy.
Halley is the only comet that can be seen twice in human life. Once present throughout human history, the last time Halley's comet "visited" the Earth was in 1986. The average orbital trajectory of the Halley comet is 76 years and it is predicted to appear. The next one was on July 28, 2061.
Like other comets, Halley Comet also possesses extremely destructive power if it collides with any planet in the Solar System, including the Earth. Compared to meteorites of the same size, comets also have a much greater destructive power. Constructed primarily from frost, gas and dust, comets travel around the Sun at extremely high speeds, up to 160 thousand km / h. Therefore, comets bring about greater death than meteors moving at a slower pace.
Halley is the only comet that can be seen twice in human life.
For example, in 1994, the comet Shoemaker-levy 9 when plunged into the deep atmosphere of Jupiter created an extremely terrible explosion, releasing the energy equivalent to a thousand large thermonuclear bombs. in the world, or 10 million tons of TNT. If Halley's comet hits the Earth, all life on our planet will be completely erased.
However, according to scientists' estimates, the probability of a collision with comets large enough like Halley, which can cause extinction, is very low. Most comets that pass the Roche limit (the closest distance an object can get to the sun) will be severely damaged. Radiation from the Sun will melt the ice covering the comet. The size of the comet therefore becomes much smaller and becomes less harmful to the Earth.
However, have you ever asked the question: What if Halley's comet crashed into the Moon during a "visit" in 2061?
In response to this "fantasy" question, popular science channel What If made a video explaining the possible impacts to Earth when Halley's comet collided directly with Face. moon .