This is a picture of Halley's Comet zooming over Earth.

  This is an animation showing that Halley's Comet was approached by the spacecraft: Gitto on March 13, 1986

Halley's Comet can be seen every 75-76 years

It was first seen and recorded in 240 BC

The last time it was seen was in 1986 it will be seen again in  July 28, 2061.

Halley's comet orbits the sun, pretending that it is a planet.

The space shuttle Gitto gave astronomers a idea of what is on it's surface.

It's nucleus is extremely low it's   scientific notation is 2.2 * 10 to the 14th power

www.wikipedia.com/haley'scomet

This is a diagram of what Halley's Comet looks like.

The Soviet Vega started sending back  images of Halley on 1986 March 4th.