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On Monday, Jupiter took a massive hit from a meteor, which was spotted by amateur astronomers based in the US—and if previous evidence is anything to go by, it could have saved Earth from a massive collision in the process.
Dan Peterson of Racine, Wisconsin, was gazing at Jupiter on Monday when he saw a bright, white flash on the surface of the planet. When he posted his observation online, another astrophotographer, George Hall, discovered he'd unknowingly captured the massive explosion on video.
Turns out it was probably a meteor striking the surface of the planet—and you can watch the video below. In fact, this is evidence of Jupiter's protective effect as far as Earth is concerned. Because the planet is so massive Jupiter's gravitational field sucks a great many asteroids and comets towards it, which means that there are fewer threats to our humble little planet.
Which is just as well: a similar metoer strike in 2009 caused a bruise on the face of Jupiter the size of the Pacific Ocean. [George 1985 via Space]
Is it even possible to hit earth surface? By the time it gets to plane flying level, it's already burnt to dust
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from a real news site
Quote:
Jupiter Explosion Spotted by Amateur Astronomers
Andrew Fazekas
for National Geographic News
Published September 11, 2012
Early Monday morning U.S. amateur astronomers spotted a bright light squiggling across the upper cloud deck of Jupiter. Both assumed they'd witnessed a large meteor or comet impact, and so far, professional astronomers seem to agree.
NASA's Amy Simon Miller, though, cautioned that, "at this point, we can only confirm based on the fact that there were two independent reports." Official observations will have to wait.
Such a strike would be the fourth impact seen on Jupiter in just the last three years. And the fact that the explosion was visible via backyard telescopes more than 454 million miles (730 million kilometers) away—indicates it was probably a significant event.
"Although we don't yet know the size or exact nature of the impactor, based on the flash brightness we expect it is slightly bigger and energetic than the one seen in 2010, which was estimated to be on the order of 10 meters [33 feet] in size," said Miller, chief of the planetary systems laboratory at Goddard Spaceflight Center in Maryland. "By contrast, the impactor in 2009 was likely 200 to 500 meters [660 to 1,600 feet]."
(See "Bright Fireball Slams Into Jupiter" [June 2010] and "Jupiter Impact Creates Huge New Spot" [July 2009].)
Leaving a Mark on Jupiter?
Amateur astronomer Dan Peterson, in Racine, Wisconsin, watched the Jupiter impact live while peering through a 12-inch telescope. Later, his counterpart to the south—George Hall of Dallas, Texas—realized he'd accidentally caught the flash on video, thanks to a webcam-telescope link. (Watch the video of Monday's Jupiter impact.)
"My best guess is that it was a small undetected comet that is now history," wrote Peterson on a telescope message board post titled "I observed an explosion on Jupiter this morning!"
"Hopefully," he added, "it will sign its name on Jupiter's cloud tops."
Searching for that signature—dark markings on Jupiter's cloud tops—is exactly what astronomers should do next, NASA's Miller said. "An impact superheats the immediate atmosphere and will essentially produce soot," she said.
Only if such stains are spotted will heavy-duty telescopes be enlisted to confirm the Jupiter blast, she said. "Professional telescopes and Hubble are typically very oversubscribed and won't be called into action unless a debris field is confirmed first by amateurs."
(Related: "Third Jupiter Fireball Spotted—Sky-Watching Army Needed.")
Jupiter Impacts "Probably Quite Frequent"
Before the recent rash of Jovian collisions, it was thought that Jupiter impacts were rare cosmic events—with the 1994 death of comet Shoemaker-Levy 9 a spectacular exception. That impactor consisted of at least 21 fragments, some as wide as 1.3 miles (2 kilometers), according to NASA.
Now astronomers have begun to think the impacts are in fact fairly common.
On Jupiter "very small events are probably quite frequent," Miller said, though many would occur on the half of the planet we can't see. "In fact, they probably happen up to once a week, but some would be too small to even make a flash."
With more tech-savvy amateurs like Peterson and Hall monitoring Jupiter on a regular basis, she said, scientists hope to get a better grip on the number of meteors floating in Jupiter's vicinity—one grainy video at a time.
"The impacts in 2009 and then 2010 showed that there were very many smaller objects out near Jupiter with the potential to impact," Miller said.
"At that point we expected that many more sightings would occur," she added, "so this new one confirms our hypothesis."
On Monday, Jupiter took a massive hit from a meteor, which was spotted by amateur astronomers based in the US—and if previous evidence is anything to go by, it could have saved Earth from a massive collision in the process.
Weasel word that is pretty much meaningless.
Chances that the meteor would have hit earth if it didn't hit Jupiter? I don't know, but maybe 0.0000000000001%.
Yep, it COULD have hit earth, but almost for sure wouldn't have anyway.
But the news people have to word it in some way to capture people's interest, I guess.
Couldnt jupiters massive gravitational pull grab a meteor that wouldnt hit us and pull it into the earth? Something super wide that just gets enough pull into our fiery doom?
If we are not able to ask skeptical questions, to interrogate those who tell us that something is true; to be skeptical of those in authority, then we're up for grabs..
-Carl Sagan
Well, since the asteroid hit Jupiter, maybe it *was* Jupiter/Zeus, the pagan Roman/Greek god that saved us, and not the Christian/Jewish/Muslim God/Allah?
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You are the second one this week to not realize a sarcastic post I made... I really thought it was pretty obvious, I even used the face (I did in the other one as well)
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