Comets have been given the nickname of ________.
Dirty Snowballs
Snowbells
Millennia Snowballs
A comet is icy, when passing close to the Sun, warms and begins to release gases, a process that is called __________.
Out-tailing
Melting
Outgassing
A __________ is a comet that becomes exceptionally bright.
Brittle comet
Great comet
Halley comet
What are the four components of a comet?
A nucleus, a coma, a dust tail, and an ion tail
Halley comet, Hale-Bopp Comet, Donati’s comet, and the Shoemaker-Levy 9 Comet
Perseid, Swift-Tuttle, Orionid and Halley
An amino acid __________ was detected from a sample taken from a comet named ‘Wild-2’ by a NASA space probe in 2009.
Threonine
Valine
Glycine
Approximately one great comet happens every twenty years.
True
False
The closest point in a comet’s orbit to the Sun is called ___________.
Periapsis
Perihelion
Pericentre
Comet Shoemaker-Levy 9 was spotted after it had broken up after a close call with which planet?
Jupiter
Uranus
Neptune
As comets approach the sun, ice in their nuclei is melted by radiant heat from the sun to give a ________.
Gas
Ice
Apsides
Comets which complete their orbit around the sun within a short time come from the __________ belt.
Oort
Asteroid
Kuiper
The Comet named Hale-Bopp was discovered in the year?
1990
1995
2001
A great comet is one which is bright enough to be visible from Earth without the need for a telescope.
True
False
The most distant point in a comet’s orbit to the Sun is called __________.
Perihelion
Apoapsis
Aphelion
Comet ISON’s dust tail is observed to span about how many miles?
10,000
57,000
64,000
Comets are invisible except when they are near the Sun.
True
False
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