Apophis and You - Neil deGrasse Tyson

Yet another good summary by Tyson. Always fun to hear.
cybrbeastsays...

Since 2006 we've know that there is almost no risk of this thing hitting us anymore:

http://en.wikipedia.org/wiki/99942_Apophis
"Additional observations of the trajectory of Apophis revealed the keyhole would likely be missed and on August 5, 2006 Apophis was lowered to a Level 0 on the Torino Scale. As of October 19, 2006, the impact probability for April 13, 2036, was calculated as 1 in 45,000. An additional impact date in 2037 was also identified; the impact probability for that encounter was calculated as 1 in 12.3 million."

NordlichReitersays...

I want to add something to this comment. The estimates that celestial body will pass through the keyhole are 1 and 250,000. Not likely but still enough to warrant a good looking at. Perhaps when DeGrasse made this video it was still consensus that it was a 1 in 37 chance of passing into the Keyhole. That doesn't seem to be the case now. But that's not to say it can't happen, it's highly unlikely.


Astronomers have identified an asteroid named Apophis that was once estimated to have a 2.7% (1 in 37) chance of striking the earth in 2029. Further observations and revisions of the estimated path of the asteroid have resulted in an estimated 1 in 250,000 chance (0.0004%) of impact in 2036.[1][2] Apophis is estimated to be as large as 1,300 feet (400 m) across, and could cause millions of casualties if it were to hit Earth.[3] Astronomers think that Apophis will most likely miss a 2,000-foot (610 m) wide keyhole in 2029 which, if passed through, would cause it to hit Earth in 2036.[3]


http://en.wikipedia.org/wiki/Gravitational_keyhole#The_Apophis_Deflection

Ok, ok, ok. 2029 it may thread the keyhole, in which the next time it comes around 2036 would be BOOM! Excellent I can't wait. Shit that means I'll be about 50 years old! Fuck! A lot can happen between now and then.


On Friday, April 13, 2029, Apophis will pass Earth within the orbits of geosynchronous communication satellites.[10] It will return for another close Earth approach in 2036.

Precovery observations from March 15, 2004 were identified on December 27, and an improved orbit was computed.[11] Radar astrometry further refined the orbit. The 2029 pass will actually be much closer than the first predictions, but the uncertainty is such that an impact is ruled out. Similarly, the pass on April 13, 2036 carries little risk of an impact.


http://en.wikipedia.org/wiki/99942_Apophis

It's traveling at 30.728 km/s. Cars generally travel at Km/h. That's about 20 miles per second, and about 32187 Meters per second. If the speed of sound is 343.174 meters per second, then 32187/343.174 would mean that Apophis is traveling at 93 times the speed of sound. Which is just a comparison because things in space tend to have different physics than things inside an atmosphere.

http://www.wolframalpha.com/input/?i=speed+of+sound
http://www.wolframalpha.com/input/?i=20+miles+per+second
http://www.wolframalpha.com/input/?i=32187%2F343.174

siftbotsays...

Replaced video embed code with backup #1011 (supplied by member bleedmegood) - embed replaced by member newtboy.

newtboysays...

From a 2021 European Space Agency report- New observations of asteroid Apophis – thought to pose a slight risk of impacting Earth in 2068 – rule out any chance of impact for at least a century. After 17 years of observations and orbit analysis, ESA is removing the enormous asteroid from its Risk List.

Send this Article to a Friend



Separate multiple emails with a comma (,); limit 5 recipients






Your email has been sent successfully!

Manage this Video in Your Playlists




notify when someone comments
X

This website uses cookies.

This website uses cookies to improve user experience. By using this website you consent to all cookies in accordance with our Privacy Policy.

I agree
  
Learn More