Nucleus length15,000 m
7,500Cattail heights
2,727Parking space lengths
97.4 trillionDiamond bond lengths
Roughly 15 × 8 km, peanut-shaped
Photo from Wikimedia Commons
Halley's Comet
The most famous periodic comet, visible every 75-79 years/Deep Space
Halley's Comet (1P/Halley) is the most well-known short-period comet, returning to the inner solar system roughly every 75-79 years. It was last visible from Earth in 1986 and will return around 2061. Edmund Halley first predicted its periodic return in 1705, making it the first comet recognized as periodic.
Measurements
Nucleus width8,000 m
533 millionWhite blood cells
419,948Penny diameters
1,194Ambulance lengths
Mass220 trillion kg
3.4 trillionCouches
81.5 billionBlue whale tongues
Orbital period2.4 billion s
264,444Marvel movies
476 billionHousefly wingbeats
6.4 thousandthsHolocene eras
About 75.3 years
Speed at perihelion54,500 m/s
1.8 hundredthsPercent light speeds
1,557Commuter trains
About 196,000 km/h at closest approach to the Sun
Perihelion distance87.7 billion m
117 billionHuman strides
1.4 billionHockey rink lengths
108 billionSkateboard lengths
About 0.586 AU