Comets are known to reside in a vast spherical halo called the Oort cloud, extending for about a light year beyond the orbit of Pluto. The forces responsible for their coming towards us are still not known. Now, John Matese and Daniel Whitmire of the University of Southwestern Louisiana, US have come up with a theory that might provide the answer. They analysed comet orbit data and concluded that the tidal forces are responsible for the comets' movement towards us. Though most astronomers agree with the theory, they feel that there is not enough data for any firm conclusion.
We are a voice to you; you have been a support to us. Together we build journalism that is independent, credible and fearless. You can further help us by making a donation. This will mean a lot for our ability to bring you news, perspectives and analysis from the ground so that we can make change together.
.png)
Comments are moderated and will be published only after the site moderator’s approval. Please use a genuine email ID and provide your name. Selected comments may also be used in the ‘Letters’ section of the Down To Earth print edition.