Halley's Comet was named after Edmond Halley. In 1758 he first noted its periodic orbit which makes it's appearance every 76 years. It has been observed by astronomers for the last two thousand years. The last time Earth caught a glimpse of this comet was 1986.
The comet now known as Halley's Comet has been observed since at least 240 BCE, but it was not known to be something that reappeared periodically. It wasn't until 1705 that English astronomer Edmond Halley determined that it was the same comet that appeared periodically.
Halley's comet's mass (weight) is exactly 2.2×1014 (TO the power of 14)
Halley's comet was so far out in space it didn't just pass England, but the earth. And it took several weeks to do so, in November 1982.
The Russians named their space probes that visited Halley's Comet in the mid-1980s as Vega 1 and Vega 2. These probes were part of an international effort involving the Soviet Union, the European Space Agency, and other countries to study the famous comet.
Halley's Comet does not rotate, but perhaps you mean revolve, as in how long it takes to revolve around the sun.If that is what you mean, then the revolutionary period of Halley's Comet is about 75-76 earth years.
Halley's Comet (that's easy, right?). Although it had been observed before, Halley was the first to discover that it was the same comet that returned at regular intervals, instead of a different object each time, and calculated its orbital period. There also exists a lunar crater named Halley.
1718
he discovered the motion of stars he discovered the motion of stars
the comet halley was bad and scary=-) the end
he flew to the moon from his own made space craft
Vega 1 and Vega 2 were the last successful Russian space missions beyond Earth's orbit. These two space probes visited Venus and Halley's Comet in the mid-1980s.
The comet now known as Halley's Comet has been observed since at least 240 BCE, but it was not known to be something that reappeared periodically. It wasn't until 1705 that English astronomer Edmond Halley determined that it was the same comet that appeared periodically.
Halley's comet's mass (weight) is exactly 2.2×1014 (TO the power of 14)
Halley's comet was so far out in space it didn't just pass England, but the earth. And it took several weeks to do so, in November 1982.
Space Shuttle Challenger explodes (January 28, 1986) and Halley's comet was visible (perihelion February 9, 1980).
Space Shuttle Challenger explodes (January 28, 1986) and Halley's comet was visible (perihelion February 9, 1980).
The object's "volume".