they didnt
The period of Comet Hale-Bopp was determined by observing its repetitive pattern of appearance in the sky over time. By tracking its position relative to Earth as it orbits the Sun, astronomers were able to calculate the time it takes for Hale-Bopp to complete one full orbit, known as its period.
A comet with a period of 200 years or more.
A comet with a period of 200 years or more.
A short period comet.
Halley's comet has a period of 76 years.
That's a nonperiodic comet, meaning it won't come back any time soon. It is hard to determine the exact period of such comets.
You can determine the direction in which a comet is moving by observing its motion against the background stars over a period of time. If the comet appears to be moving eastward against the stars, it is moving in a westerly direction in relation to the Earth. If it appears to be moving westward, it is moving in an easterly direction from Earth's perspective.
Long period comet
Yes, the time it takes for a comet to complete 1 orbit is called a period.
a comet that has the shortest period- 3 yrs. 4 mos.
Comet (C/2010 X1 (Elenin)) is a long-period comet.
People of the Comet was created in 1948.