It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Norwegian captures first-ever video of an extinguished meteorite that shot past him soon after he deployed his parachute; search for the rock continues.
A skydiver in Norway captured incredible video of an extinguished meteorite shooting past him soon after he deployed his parachute, something that has never been seen before, let alone been recorded.
“This is the first time in history that a meteorite has been filmed in the air after its light goes out,” geologist Hans Amundsen told the Norwegian Broadcasting Corporation, Norway’s largest media organization also know as NRK.
Skydiver Anders Helstrup was lucky. The rock very nearly hit him, it passed so close.
Yes they do if they are small enough which most are.
This really surprised me as I thought that meteorites did not extinguish but kept burning all the way down to the ground. Can someone confirm that sometimes they go out at a certain level?
The burning or "ablation" occurs when slowing down from tens of thousands of kilometers per hour to hundreds of kilometers per hour, after which it reaches "terminal velocity" which gets slower as the air gets more dense and as the object gets smaller.
maybe they slow down a lot and cool down when subjected to the Earths atmosphere. The shuttle does not though since it has to have special tiles on its surface to take the heat from the friction of the atmosphere.
They do heat up as the air gets denser and if they are big enough, they explode, but that happens at a pretty high altitude. Then the smaller pieces tend to slow down more quickly, and reach "terminal velocity" which can make them warm but not really "burning" hot. Terminal velocity is what a skydiver experiences before his parachute opens, it's more or less a constant speed.
Wouldn't something keep heating up as the air got denser, even as it slowed down some?
If it's big enough, and it didn't explode, it could happen, but I think it would be unusual. Meteor crater in Arizona was probably formed by an iron impactor that blazed all the way in because it was probably dense enough to not explode in the atmosphere and it was still going pretty fast when it hit.
I've seen meteorites coming in near me (maybe the sand-sized ones, hard to tell) and they seem to blaze all the way in.
In this example it is predicted to explode at an altitude of 51 km. After it explodes the smaller fragments have a hard time maintaining their speed because they have so much surface area. Most of them probably won't even make a crater when they hit the ground, they are going so slow, as shown at this impact site of fragments of a truck-sized meteor that exploded at about 37 km altitude in 2008:
Distance from Impact: 100.00 meters ( = 328.00 feet )
Projectile diameter: 3.00 meters ( = 9.84 feet )
Projectile Density: 2000 kg/m3
Impact Velocity: 22.00 km per second ( = 13.70 miles per second )
Impact Angle: 45 degrees
Target Density: 1500 kg/m3
Target Type: Crystalline Rock ...
The projectile begins to breakup at an altitude of 69700 meters = 229000 ft
The projectile bursts into a cloud of fragments at an altitude of 50800 meters = 167000 ft
The residual velocity of the projectile fragments after the burst is 20 km/s = 12.4 miles/s
The energy of the airburst is 1.19 x 1012 Joules = 0.29 x 10-3 MegaTons.
No crater is formed, although large fragments may strike the surface.
2008 TC3 meteorite fragments found on February 28, 2009 in the Nubian Desert, Sudan.
How is this breaking,news?
Just saying ....