Comets
Icy visitors that grow tails near the Sun.
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5- Comet
Comet Hale–Bopp
A long-period comet that was widely visible to the naked eye in 1997.
- Comet
Comet Hyakutake
A comet that passed very close to Earth in 1996.
- Comet
Comet NEOWISE
A long-period comet discovered in 2020 that became a bright naked-eye object in the Northern Hemisphere sky.
- Comet
Comet Shoemaker–Levy 9
A comet that broke apart and collided with Jupiter in 1994.
- Comet
Comet Swift–Tuttle
A periodic comet (109P/Swift–Tuttle) that is the parent body of the Perseid meteor shower.
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2- Comet
Giacobini–Zinner
A Jupiter-family comet, parent of the Draconid meteor shower, and the first comet ever visited by a spacecraft — NASA's ICE probe flew through its tail in 1985.
- Comet
Grigg–Skjellerup
A Jupiter-family comet visited by ESA's Giotto in 1992 during its extended mission, after Giotto's earlier encounter with Halley.
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2- Comet
Schwassmann–Wachmann 3
A Jupiter-family comet that began fragmenting in 1995 and has since broken into dozens of pieces — a rare chance to watch a comet disintegrate over successive returns.
- Comet
Siding Spring
A long-period comet that made an exceptionally close pass of Mars in October 2014, observed up close by the fleet of Mars orbiters and rovers.