What is a rare comet called?

The streaker, named Comet NEOWISE or C/2020 F3, was first on the scene in late March. The icy lump was quite weak in our skies at that point, and astronomers weren't sure that would change.

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What is comet in simple words?

A comet is a small, icy object that orbits the sun and has a long "tail" of gas. Some comets can be seen from Earth every few years, while others pass by once in a person's lifetime. Comets are made of ice, dust, and tiny pieces of rock, but to people on Earth, they look like streaks or smudges across the night sky. Then, what size comet is a planet killer?

Are comets bigger than asteroids?

They are characterized by having orbits lying always within the region of the outer planets. The sizes of those discovered so far is comparable to the larger asteroids and hence they are much bigger than a typical cometary nucleus. Are comets faster than asteroids? In fact, comets can be traveling up to three times faster than NEAs relative to Earth at the time of impact, Boslough added. The energy released by a cosmic collision increases as the square of the incoming object's speed, so a comet could pack nine times more destructive power than an asteroid of the same mass.

What happens if a comet hits the Sun?

What will happen? Nothing will happen. The mass and the heat of the Sun are of such magnitude that even the biggest object in the solar system, Jupiter, hitting the Sun would cause just a momentary hiccup, and comets are actually tiny objects in the scale of the solar system.