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Bad Astronomy

Posts Tagged ‘fireball’

Fireball over Germany

[UPDATE: Turns out the fireball described below was the re-entry of the Soyuz booster that brought Expedition 30 up to the International Space Station a few days ago. Thanks to Marco Langbroek for alerting me to this!]

[Update 2 (19:08 GMT): More footage, and a picture in a Dutch paper. Tip o' the Whipple Shield to VirtualAstro and JHG Hendriks.]

Reports are coming in of a very bright fireball over Germany, Belgium, and the Netherlands. It happened around 16:30 GMT (17:30 local time in that part of Europe) on December 24 (just a couple of hours ago as I write this). I heard of it when BA Bloggee Dave Grant sent me a note from Dusseldorf; he got video of it!

If you are in that area and saw it, you can report it to the International Meteor Organization or to The Latest Worldwide Meteor / Fireball Reports (note: I found that last site doing a bit of searching and I’m not familiar with it, so I don’t know how official it may or may not be. There are links in the sidebar there to other organizations). make sure you list your position as best you can, and what direction you were looking.

If you did see it, and have pictures or video, please leave a comment below with a link! It’s a holiday, but I can try to post some of the better shots/footage. The more actual footage there is, the better astronomers can trace both the direction from which it came, and the location of any possible meteorites.

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December 24th, 2011 11:38 AM Tags: Belgium, fireball, Germany, meteor, Netherlands
by Phil Plait in Astronomy, Cool stuff, DeathfromtheSkies!, Pretty pictures | 28 Comments » | RSS feed | Trackback >

Explosion in Argentina following a “ball of fire from the sky”

[Update: It looks like the cause of this was a gas bottle exploding, and not a meteorite. See the update for 21:15 UT below).]

A deadly explosion and fire occurred in Argentina overnight, reportedly killing one woman and injuring several others. Two homes, a store, and several vehicles were destroyed or damaged.

The thing is, while it’s not clear what caused this incident, several people said they saw a ball of fire descend from the sky when it happened.

Neighbors’ accounts describe a ball of fire coming from the sky as the cause of the explosion. The chief of the firefighters, Guillermo Pérez, however, said the "causes remain unknown" and that "gas containers were found intact," ruling out a gas related incident.

Other reports are similar; in that article the ball of fire was described as being blue. I know a lot of folks will think this was caused by a meteor, but it’s a bit early to run with that yet. For one thing, it could’ve been a small plane on fire, for example; this happened very early in the morning (2:00 a.m.), and from the reports I’m seeing it’s not clear if the witnesses were already awake when they saw this or were awakened by it. Eye witness reports are notoriously unreliable, and it can’t help if the witnesses were suddenly woken up.

[Update (17:30 UT): This is looking less like a meteorite to me; this news story has a witness saying he saw the blue fire after hearing the explosion, and after he went outside to see what was what. Thanks to JoseManuelp2 for the link.]

As testament to that, I’m seeing some reports that the ball was red, and a picture was posted to the imaging site yfrog claiming, without any any supporting evidence, to be a shot of it. I include it here; note it’s very dark, out of focus, and very low resolution (from the pixelation). I have no clue what this picture shows, but I have my doubts it’s a fireball. I expect we’ll be seeing lots of rumors and things like this today.

[Update (21:15 UT): The image shown here of the red fireball is a hoax, and the man responsible for it has been arrested. Also reported in that link is that there were gas bottles secretly hooked up to a pizza making stove in a nearby house, and that this may be the cause of the explosion. I expect that is the final straw on this story -- enough evidence is piling up that this was not something form space, or even from the sky; it was some kind of terrestrial event, as expected.]

The explosions and devastation appear to be very real, though. This is the only video I could find on YouTube, and it has no audio, but it shows the aftermath:

I don’t see any obvious airplane wreckage, but it’s hard for me to see that a meteorite impact would’ve done this; for it to have been big enough to cause this much devastation, there would’ve been a big crater as well (like the one that hit in Peru a couple of years back). None is evident, so I’m strongly of the opinion something more terrestrial was to blame here.

I won’t be surprised to hear people asking if this was from the UARS satellite, too. However, that’s pretty much impossible; the satellite came down Friday night, and there couldn’t have been pieces of it still in orbit two days later. Also, again, the type of destruction seen here is unlikely to have been from just a simple impact.

Hopefully we’ll find out soon. If you hear anything please leave a comment below (with a link if you have one), and I’ll post an update when I learn more.

[Update: A grass fire in Texas Saturday night has been reported, and it's claimed to be linked to something falling from the sky. Again, a meteorite is extremely unlikely there, since it would take a big impact to ignite fires. Stuff like this happens all the time, and remember Texas is extremely dry right now. I would guess this was fireworks, but there's not much info on this story either. Thanks to Baron Grim on Twitter for the story.]

Tip o’ the Whipple Shield to Antropomorficah on Twitter. Image credit: screen grab from embedded C5N video.


Related posts:

- UARS down over the Pacific ocean
- Meteorite mayhem III: solved
- Peruvian “meteor” freaks out medi
- Midwest megameteor makes media madness
- What a falling star looks like… from space!

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September 26th, 2011 9:32 AM Tags: Buenos Aires, explosion, fire, fireball, impact, meteorite
by Phil Plait in Astronomy, Skepticism | 94 Comments » | RSS feed | Trackback >

… and a real meteor over Georgia

While the object in Peruvian skies may not have been a meteor, this thing certainly was:

That was a fireball — an extremely bright meteor — that blew in over Atlanta, Georgia on August 28. The video is from the webcam at the Tellus Museum of Science in Georgia, part of the All Sky Fireball Network (I wrote about them recently when this same camera caught the space station passing overhead, in fact). The other streak you can see moving is an internal reflection in the camera, I believe, which shows you just how bright this fireball was.

Since there are four cameras in the network, they could triangulate on the meteor, getting its height off the ground. Coupled with its apparent speed, that tells them it was screaming in at more than 83,000 kph (52,000 mph)! Given how bright it was, I suspect it was probably about the size of a grapefruit or so. Funny how something that small can make such a bright streak, but then speed is the key here. The brightness of a meteor depends on how much energy it can deposit in the atmosphere, and that is determined largely by its kinetic energy. That, in turn, depends on its mass and its velocity… and these things are moving far, far faster than a rifle bullet.

The Tellus webcam caught other meteors that night too, which you can see here. They’re getting lots of information about the debris that hits us. And since about 100 tons of material enters Earth’s atmosphere every day, there are plenty of interesting things to discover!


Related posts:

- Shooting satellites, old and new
- New meteor showers points to a future close encounter
- How high is space?
- Mesmerizing Perseid timelapse video

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September 1st, 2011 9:51 AM Tags: fireball, meteor, Tellus museum
by Phil Plait in Astronomy, Cool stuff, Pretty pictures | 10 Comments » | RSS feed | Trackback >

Peruvian “meteor” freaks out media

A few days ago, the web was abuzz with something that looked like a very large meteor burning up over Peru. Here’s video from ITN news:

You can find similar videos on Youtube. However, is it actually a meteor?

Cutting to the chase, I don’t think so. I don’t have a lot of solid evidence either way, but all signs point that way. Here are my thoughts:

1) Meteors tend to move more quickly. They usually burn up around 100 km (60 miles) up, roughly, and are moving at a minimum of 11 km/sec (7 miles/sec) — Earth’s gravity pulls them in to at least this speed. If you’ve ever seen a meteor you know they zip across the sky in at most a few seconds.

2) The two trains (the technical term for what most people would call the tail or trail) are very odd — you can see them in the frame grab here. I’ve never seen a meteoroid (the actual solid bit moving through our atmosphere) produce more than one train. I don’t think this is an optical effect due to the camera but actually two distinct trains.

(more…)

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September 1st, 2011 7:00 AM Tags: airplane, fireball, meteor, Peru
by Phil Plait in Astronomy, Cool stuff, DeathfromtheSkies!, Debunking, Pretty pictures | 65 Comments » | RSS feed | Trackback >

Wisconsin meteor update: meteorite found

Apparently, the first meteorite from the fireball over Wisconsin has been found: a pair of brothers discovered a small chunk of the bright meteor that burned up over the midwest skies Wednesday night.

wisconsin_meteoriteIt certainly looks like a meteorite (click to embiggen); the outer blackened fusion crust is from passing through the air, and the interior has the gray, grainy structure in common chondrites. The cube is one centimeter in size and is used in photos like this to give scale.

Pretty cool. There may be thousands of such meteorites lying on the ground in Wisconsin right now; the meteoroid itself was probably a meter or so in size and weighted about a ton. Meteorite hunters are already there searching, and I hope that most of the fallen rocks will be sent to researchers for analysis.

Falls like this are very important scientifically. Having a lot of eyewitnesses means the path and therefore the orbit of the rock can be ascertained, and many times such meteoroids are part of a family of such objects; all on related orbits and probably from the same parent body. When we get samples of the meteorites that means we have samples of an asteroid!

So if you live in that area and find something suspicious, take photographs of it where it is, then carefully put it in a baggie or box (use gloves if you can so you minimize contamination) and contact a local University. The vast majority of rocks found this way aren’t meteorites (we call ‘em meteorwrongs, haha) but it’s worth making sure.

Image: Terry Boudreaux, submitted to Rocks From Space by Michael Farmer.

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April 16th, 2010 11:21 AM Tags: chondrite, fireball, meteor, meteorite, Wisconsin
by Phil Plait in Astronomy, Cool stuff, DeathfromtheSkies! | 55 Comments » | RSS feed | Trackback >

Fireball lights up the sky: South African division

A little while back, a bright fireball lit up the evening sky in Utah. There was a repeat performance just last week, on November 21, this time in South Africa. A CCTV camera captured the dramatic scene:

If you happened to see this fireball and got footage, the local news wants to see it. The more footage that’s available, the better scientists can understand the meteoroid that burned up, including getting a trajectory and possibly even an orbit for it.

I’ll add that the Utah and African events are almost certainly unrelated; they happened days apart. At orbital speeds, that means the two objects were probably millions of kilometers apart in space, and so most likely coincidental.

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November 30th, 2009 12:00 PM Tags: fireball, South Africa
by Phil Plait in Astronomy, Cool stuff, DeathfromtheSkies! | 22 Comments » | RSS feed | Trackback >

Midwest megameteor makes media madness

[For those complaining about my title, I said "midwest" because the meteor was seen as far east as Colorado, which sits on the west/midwest border, and, duh, I needed a word that started with "M".]

By now you’ve probably heard of the extremely bright fireball over Utah last Wednesday, proving once again that really cool stuff happens when I’m on travel and can’t write about it. Worse, it was seen from Denver, which means I might’ve had a shot at seeing it myself.

Sigh.

Anyway, this meteor was so bright it overexposed security cameras, turned night into day, and cast obvious shadows on the ground. This video shows several different views of it:

Whoa.

The coolest thing about these videos is, to me, the way the shadows of objects move rapidly around as the meteor flashes across the sky. I describe this very thing in the opening vignette of the asteroid impact chapter of my book Death from the Skies! The video is pretty much exactly as I imagined it would be. Yikes.

Of course, not everyone thinks this was just a chunk of rock burning up harmlessly in our atmosphere. Because, after all, why assume it was a natural event that occurs quite often, when you can add layers of nonsense and conspiracy to it? Fark alerted me to the idea that this was actually a nuclear missile shot down over the US, despite the video, pictures, and eyewitness accounts completely contradicting the idea that this was anything other than a meteor. But for some people, facts won’t get in the way of a good story!

Anyway, while spectacular, the Earth is probably subjected to meteors like this several times a year. As I have said before, now that we have security cameras and phones with video, we’ll be seeing more and more of videos like this, which is a good thing: it’ll make people more aware of the sky. I’m all for that!

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November 22nd, 2009 8:00 AM Tags: fireball, meteor
by Phil Plait in Astronomy, Cool stuff, DeathfromtheSkies! | 54 Comments » | RSS feed | Trackback >





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      Phil Plait, the creator of Bad Astronomy, is an astronomer, lecturer, and author. After ten years working on Hubble Space Telescope and six more working on astronomy education, he struck out on his own as a writer. He's written two books, dozens of magazine articles, and 12 bazillion blog articles. He is a skeptic and fights the abuse of science, but his true love is praising the wonders of real science.


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