Meteor Definition and 99 Threads

Did the meteor or comet that struck Earth at the end of the Cretaceous punch a whole in the crust down to the mantle? If so, why isn't that part of the crust weak and showing signs of volcanism? Even if the crust wasn't punctured down to the mantle, wouldn't it still be a weak spot and show...

I tried posing my question by using some Latex features here, but I could work faster by using Word coupled with what I could use from Latex here. When I tried putting the material here from Word, it didn't work out, so I'm attaching a pdf of my question. The reference to IMO is the...

So I know a meteoroid is the small thing floating in space while an asteroid is the large one. I know a meteor is the streak of light a meteoroid creates as it falls through the atmosphere and a meteorite is what remains after the impact on the Earth. Also, that meteorites can sometimes be...

I'm hoping for some advice from those who know better. The Lyrid meteor shower is going to be best viewed here (North America) in the 'wee hours' of April 22 (call it 2 am). Since I'm not a vampire, I'd like to make a plan now in order to prevent making a stupid mistake due to being mostly...

Computing the period of a meteor using two ways. I'm looking at code that computes the orbit found for a meteor. It computes the period of the meteor as: a = 13.07 # semi-major axis in AU P = m.sqrt(a*a*a) # From the program which yields P = 47.2512586393 Years If I use the...

From 2:00 until 4:00 Wednesday morning there will be a meteor shower in Kansas that will be visible from South Jersey. I will be out there watching Evo dodge the bigger ones. The prediction is for 100 meteors per hour and moonlight will not wash out the show.

Homework Statement a 12 kg meteor experiences an acceleration of 7.2 m/s^2, when faling towards the earth. How high above the Earths surface is the meteor? Homework Equations mass of earth= 5.98x1024 kg radius of earth= 6.36x106 m g=G*MEarth/r2 r=√G*ME/g The Attempt...

Look up after 10 pm EST tonight and be sure to duck lest you get one of these grains of sand in your eye. The nearly full moon will wash out some of it, but still you should get 40 streaks an hour. I'm really looking forward to it, as we haven't had a shower in months.

On a clear, dark night, one may observe the sky and see a few bright streaks of light across the vast dome of the sky. These are what we astronomers call meteors, more commonly called "shooting stars." Meteors are not actually shooting stars, they are fragments of debris falling at high speeds...

If there was a Meteor traveling at around 25,000 mph and was about 1km wide that hit Nevada, would that take out the whole state? And how much debris would be floating about the atmosphere? How long does that stuff block the sun out? And also, would that debris travel in a certain...

a 12 kg meteor experiences an acceleration if 7.2 m/s^2. when falling towards the earth a: how high above the the Earth's surface is the meteor? b: what force will a 30 kg meteor experience at the same altitude? attempt: i'm, not sure which equation to use..would it be v= sqrt(Gm/r)?

If a meteor entered the Earth's atmosphere at 11 or so km/sec and impacted the Earth with a direct hit (by impact time it is 4 kg), what would the force of impact be? I only need a rough answer.

I've written a Python program to simulate a meteor falling into the Earth's atmosphere. It's fairly straightforward. I give it the lat/long of two observing stations, and the lat/lng where the meteor begins along with an angle from north for the direction. An initial height above the beginning...

How do meteor showers happen?

I'm pondering right now how to design a bunker that would have the greatest chance to withstand apocalypse First I need to know: -How fast does the meteor have to be to wipe out 99% of all life on the earth -How deep does the meteor dig and what magnitude Earth tremors and what speed...

I have wondered how vulnerable is the Space Shuttle to an impact by a small meteor. If a golf ball sized or even a marble sized meteor struck the shuttle, isn't there a very strong possibility of puncturing the shuttle? Would a small hole in the shuttle be catastrophic, causing all the air to...

If I claim to have found structures that look like meteor craters on Earth, who should I go to to get them verified? The ones I've found don't appear to have been described in the literature (but you never know). If it helps, these structures are all in Australia.

First off, love the site and I use it all the time to get my mind working and I really appreciate everyone who puts the time into answer questions and contribute their two cents to questions that are, at the moment, unanswerable. My question is regarding meteor showers and what mechanisms...

Meteor Garden Problem :( Homework Statement [FONT="Courier New"]Hi Guys.. I am really having a trouble in physics.. :( I really can' t solve uniform accelerated motion problems correctly. Can someone help me? please.. Our teacher gave this Meteor Problem. Help Please. An unforgettable...

http://en.wikipedia.org/wiki/Perseids Eyes on the sky tonight.

You might have heard about this story, it was on slashdot.org last week. On July 6th 2009 at 1:04 AM a fireball streaked across northern Maryland and Southern Pennsylvania. Hundreds of eye witnesses reported the meteor causing a sonic boom and shaking houses. Amateur astronomer Mike Hankey in...

Hello, I have a question for the astronomy people here. Last night I was outside around 10 P.M, and at one point I just happened to be staring up into the western sky when I saw one of the brightest, most beautiful meteors I have ever seen. The weird thing is that it had a faint green tint to...

Homework Statement A 1250kg meteor rock fragment is momentarily at rest at an altitude of 3000km above the surface of Neptune. Neptune has a mass of 1.03x1026kg and a radius of 2.48x107m. Determine: how much work is done on the rock by Neptunes Force of gravity as the rock falls to...

I wonder if anyone could help me with this. What would be the rate of decline be for a meteor travleing 32,000 mph 39 degrees that weighs 1 million tons and is 80 x 100 m. And if possable what would the force of it's impact be? I am preety bad at math so I need a little help. I'm not sure...

Homework Statement Alright, so I've given this guy a few cracks, and I think I'm close to it, but apparently I'm not right, so here's how it goes. Simple in concept. A meteor moves toward the solar system with speed v0 in a direction such that it would miss the sun by a distance d if it...

Homework Statement A meteor streaking through the night sky is located with radar. At point A its coordinates are (5.20km, 1.20km), and 1.18 s later its has moved to point B with coordinates (6.24, 0.915). 1. Find the magnitude of its average velocity between these two points. 2. Find...

Homework Statement A meteor streaking through the night sky is located with radar. At point A its coordinates are (5.60 km, 1.40 km, and 1.10 s later its has moved to point B with coordinates (6.12 km, 0.900 km). Find the magnitude of its average velocity between these two points...

A 3400kg meteor (c=450 J/KgC) at 1250 degrees C falls into lake michigan, which is at a temperature of 12 degrees C. Assuming the temperature of the lake remains constant, A) What is the entropy change of the meteor as it reaches thermal equilibrium with Lake Michigan? B) What is the total...

if i know a meter is observed at an altitude of 6km, to be traveling with an initial velocity of 20 km/s and the decelerating at a rate dv/dt=0.2km/s^2, which formula i should use to get the length of the semimajor axis of the meteor'orbit?

Homework Statement What is the Kineti energy of a 1g (0.001kg) meteor traveling at 30,000m/s? Express your answer in Joules. Homework Equations KE=1/2MV^2 The Attempt at a Solution 1/2(.001kg)(30,000)^2 = 450000J Now since 30,000 is squared, would i have to multiply .001kg by...

I am trying to find an equation to figure out the ratio between the size of a falling object such as a meteor and the size of the impact crater.

A meteor that came down in the NW this morning was caught on camera. A pilot reported seeing it hit the ground.

I just saw a very bright meteor streak across the sky. I thought someone was shooting off fireworks until I remembered this.. http://www.griffithobs.org/skyreport.html I want to go out and watch some more, but it's cold outside.

Homework Statement A meteor of mass about 3.4 x 10^12 kg is heading straight for Jupiter. When it hits there will be a huge release of energy, visible her on earth. Assuming it has fallen from far away, how much energy will be released when it hits Jupiter? The radius of Jupiter is 7 x 10^7 m...

http://www.telegraph.co.uk/news/graphics/2007/09/19/wperu.jpg "Eyewitnesses watched a fiery ball fall from the sky and smash into the remote Andean plain near the Bolivian border on Saturday, local media reported." "When villagers went to investigate, they encountered fetid, noxious...

There's some buzz that this one may storm briefly for about 1 hour centered on about 4:30am Pacific Daylight Time (11:30 UT). That's just about 1 hour from now. So anyone whose still awake might want to peek outside. Maybe you'll see hundreds, or maybe none at all. I've seen storm...

Don't forget, tonight is supposed to be awesome. Unfortunately civilisation has crept up on me so there is always light and my idiot neighbors keep all their outdoor lights on, so I will probably see nothing. 'Great Show': Perseid Meteor Shower Peaks Sunday Night...

I saw a bright green meteor yesterday. What would cause a meteor to be bright green? Is this common?

yes this meteor is responsible for global warming. http://www.scienceagogo.com/news/tunguska.shtml

According to one estimate, our planet exposes itself to meteor showers in particular once every 26,000,000 years. Our genetic ancestors often had to adapt to the extreme conditions presented by such catastrophic potential. This included natural selection that could have passed down a special...

A friend and I were sitting on this mound of dirt in a deserted work site, and I lifted up a black piece of rock. I know it is not coal, as it does not look like coal, it highly resembles volcanic ash as it is super light, but there's no volcanos here in Northern Ireland, then I thought it...

A meteor whose mass was about 10^8 kg struck the Earth (m = 6.0 X10^24 kg) with a speed of about 11 km/s and came to rest in the Earth. (a) What was the Earth's recoil speed? (m/s) (b) What fraction of the meteor's kinetic energy was transformed to kinetic energy of the Earth? (%) (c) By...

I have seen this recent photo of a twisted meteor train http://antwrp.gsfc.nasa.gov/apod/ap050202.html As the image shows, the meteor followed an spiral path, I couldn't imagine that such thing was possible. Does somebody here take photos of meteors? Ever photographed a twisting path?

Reference: http://www.harktheherald.com/modules.php?op=modload&name=News&file=article&sid=43167&mode=thread&order=0&thold=0

A meteor has a speed of 83.0 m/s when 811 km above the Earth. It is falling vertically (ignore air resistance) and strikes a bed of sand in which it is brought to rest in 3.31 m. What is its speed just before striking the sand? So here is the formula that I have but it doesn't give me the...

Just wondering if anyone was able to catch the meteor shower this morning. It was cloudy and hazy in my area but some friends and I drove out to the country for a look anyway. We actually saw a few through some of the small gaps in the clouds. I bet had it been clear we would have had an awesome...

I have always thought that a meteor enters the Earth's atmosphere and impacts the ground (if it doesn't disintegrate first) at an angle. I saw something a few months ago which has bothered me ever since. I live in an area of farms, cow pastures and wilderness preserves. I was driving one...

http://news.bbc.co.uk/2/hi/uk_news/wales/south_east/3155928.stm

"But a major obstacle, the Moon, will work against attempts to spot the fiery space dust this year. The Moon will turn full on Aug. 12, severely hampering observations just at the wrong time. Bright moonlight will flood the sky all through that entire night."...