|HubPages Device ID||This is used to identify particular browsers or devices when the access the service, and is used for security reasons.|
|Login||This is necessary to sign in to the HubPages Service.|
|HubPages Traffic Pixel||This is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.|
|Remarketing Pixels||We may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.|
|Conversion Tracking Pixels||We may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.|
Asteroid V's Comet
I know asteroids have hit the planet but is there any evidence that a comet has ever crashed into us? How likely is it that a comet could crash into the Earth?
It is very unlike that a comet will hit earth because comets are usually small and in a very eccentric orbit (flatten orbits) around the sun. They have a higher change of falling into the sun than hitting the earth. Furthermore, as a comet orbits the sun and approaches it some of the comet burns off and gets smaller. Therefore comets do not last long enough to become a serious threat to earth and eventually falls into the sun after a few revolutions around it.
Asteroids are chunks of rock that orbit the Sun in a belt. They are not very big though, if they were all put together, they would form a body no more than 1500km in diameter! The biggest asteroid in the Asteroid Belt is Ceres, and it is only around 900km across, another asteroid, called Braille, is only 2km in diameter!
Asteroids don't get very bright either. The brightest ones only get to around magnitude 6 or 7. You need a telescope or a pair of binoculars to be able to see any.
Comets are a bit different from asteroids. They orbit in big, elliptical orbits. Some go out to the edge of the Solar System and then back into the inner Solar System, but others can go way out of the Solar System, past the orbit of Pluto! As they come back into the inner Solar System, and get closer to the Sun, they get brighter and brighter. Some of them get bright enough to be visible with the naked eye. As they get closer to the Sun, they also start to form a tail.
For more of such interesting facts you can log on o http://www.edurite.com
by The Medicine Man22 months ago
Time Doesn't Exist! It's a concept tracking the Earth rotations and orbits around the Sun. Yes? No?Time isn't a thing or an object. It doesn't externally exist.
by Sychophantastic3 years ago
According to Discovery.com, 1 in 4 Americans does not know that the Earth orbits the Sun. Does this say anything about America? Who are these people?
by Oztinato2 years ago
Is towing an asteroid to the moon a stupid idea?Scientists now want to capture an asteroid and tow it to the moon to put it into orbit. Along with the A-bomb, thalidomide, asbestos etc etc this has to rank as a really...
by Stacie L6 years ago
All eyes are on huge asteroid buzzing Earth on Nov. 8 By Leonard Davidupdated 10/27/2011 1:53:20 PM ETMark Nov. 8 on your calendar. A huge asteroid that could potentially threaten Earth in the far future will pass close...
by Rafini10 months ago
My son thinks so, and now I'm beginning to think it could be true - has this theory already been considered? I mean, it's impossible to know what the sun is really made of...all we know for sure, is that its still...
by Eugene Hardy6 years ago
Should humanity make the long term investment in establishing and maintaining industrial and technical colonies for access to resources and research?
Copyright © 2018 HubPages Inc. and respective owners.
Other product and company names shown may be trademarks of their respective owners.
HubPages® is a registered Service Mark of HubPages, Inc.
HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.