Halley's comet

Earlier Appearance:  April 20 (Sun) & May 19-20, 1910 @ 13.9 Million Miles from Earth - Speed was 157,800 mph, or some 85 times the speed of a bullet!  The Earth spent 6 hours inside the 24 million-mile-long tail (Some 6,056 times the width of our planet).    
Last Appearance:  February 9 (Sun) & April 10, 1986 @ 39 Million Miles from Earth - Speed was 121,572 mph.
Water release from the comet was measured by the spacecraft Giotto Per Minute :  2 Million Pounds or
​230,000 Gallons or the equivalent of 12 average size swimming pools!
Furthest from the Sun:  December 9, 2023 @ 3.3 Billion Miles - Speed is 2,034 mph.
Next Appearance:  July 28 (Sun) & 29, 2061 @ 44 Million Miles from Earth - Speed will be at 121,356 mph.
Subsequent Appearance:  March 27 (Sun) & May 7, 2134 @ 8.5 Million Miles from Earth (Closest to Earth ever know to occur) - Speed will be at 146,052 mph.  

Edmond Halley (1656-1742)

Bayeux Tapestry (1066)

First Photographs of Halley's Comet in 1910.

Halley's Comet in 1910 with long tail developing.

Halley's Comet on May 29, 1910 on its way out.

The head of the comet in 1910, passing just 14 million miles from Earth. We passed through the tail on May 19 of the same year.

Comet Halley in 1986 with our Milky Way in the background.

In 1986, we were able to take the first color images, revealing both the yellow dust tail and the faint bluish ion tail too.

Europe sent the Giotto spacecraft to intercept the comet in 1986.

Giotto's closest image at just 370 miles from the nucleus of the comet!

Giotto's color camera shows some colors and the coma around the nucleus.

Taken in 2003, some 17 years after its last appearance, the comet was imaged at a distance of 2.6 billion miles from the Earth!

81 individual exposures from the 8.2-M VLT telescope, with a total exposure time of 9 hours, were combined to show the magnitude 28.2 object nearly 1000 million times fainter than what can be perceived with the unaided eye.