* Distance from the Sun: Comets speed up as they approach the Sun due to its gravitational pull.
* Orbital Path: The shape of a comet's orbit influences its speed. Comets with highly elliptical orbits experience significant changes in speed throughout their journey.
* Initial Velocity: The speed at which a comet was ejected from its original location (like the Oort Cloud) also affects its overall speed.
Here's a general idea of comet speeds:
* At their fastest, comets can reach speeds of up to 150,000 miles per hour (241,400 kilometers per hour) when they are closest to the Sun.
* On average, comets travel at speeds of around 20,000 to 50,000 miles per hour (32,000 to 80,000 kilometers per hour).
For reference, that's roughly:
* 100 times faster than a commercial airplane
* 3-7 times faster than Earth's orbital speed around the Sun
Some notable examples:
* Comet Hale-Bopp: This famous comet reached a speed of about 150,000 miles per hour at its closest approach to the Sun.
* Comet ISON: This comet, unfortunately, disintegrated near the Sun, but it was traveling at a speed of around 150,000 miles per hour during its journey.
So, while it's impossible to give a single "speed" for a comet, you can see that they travel incredibly fast through space, especially when they're near the Sun.
