Asteroid Definition and 285 Threads

Here's an assessment of the feasibility of diverting asteroid 1981 Midas into a collision with Earth in the year 2018. I'm posting this to show the potential military-political advantage to controlling access to space. Note the relatively small size of the divert delta-vee. Only about 301.5...

We recently had a study group to look over some problems we were given in preparation for our upcoming exam. There were two problems that gave us a little bit of difficulty. There's a lot of stuff here, but I tried to trim it up as much as possible so as not to scare off any help. If I need...

Homework Statement A package with mass m sits on an airless asteroid of mass M and radius R. We want to launch a package straight up in such a way that its speed drops to zero when it is a distance 4R away from the center of the asteroid, where it's picked up by a waiting ship before it can...

Homework Statement I need to know how to apply the coefficent of friction and gravity to a 3-coordinate (3D) velocity vector. For my Intro to C Programming class, our final project is to write a program that simulates the trajectory of an asteroid passing a gas giant. The problem is, I...

Hi I got this question, it looks like its simple. But I don't know if I've done it right or not? Please help me check it. A 2kg rock is heading straight for a space station at a speed of 100 m/s. The crew plan to break the rock up into small fragments by hitting it with a rocket of 3kg...

Please help me to understand this question: I'm paraphrasing it. A speed (relative to earth) and mass for an asteroid are given, and the asteroid strikes the Earth tangentially in the direction of the Earth's rotation at the equator. The question tells us to use angular momentum to find the...

A planet is hit by an asteroid whose mass is M, velocity v, and it's velocity vector is 22 degrees below the Eastward horizontal. The planet has a radius R. I used the equation l = r m v sin \phi but the answer was wrong. Am I not doing this correctly?

Is this a realistic scenario for an asteroid impact, given the simulated physical dimentions of this mass? Video: http://www.spikedhumor.com/articles/34979/What_A_Meteor_Would_Do_If_It_Hit_Earth.html?autoplay=true"

They say if we needed to destroy and asteroid headed for Earth the fastest easiest way is witha nuclear bomb. If we used it it would destroy it but it would create thousands of pieces falling to Earth which would be much worse. In a special it was said that it would take a bomb on the order...

Is this a video of a small asteroid or comet impacting Earth's atmosphere? Exactly what kind of scientific data is being displayed in this video? Reference: http://video.google.com/videoplay?docid=-9105627519592040246

I'm playing matchmaker again. A guy on another board (ADP) is doing research for a story about a near-miss asteroid and he wants to get his physics right. I am strongly suggesting he do a proper simulation so he's got his numbers straight. Would anyone with the right software be willing to...

I understand the concept of angular momenum, but I do not understand how to use it in this problem: An asteroid of mass 1.0 * 10^5 kg, traveling at a speed of 30 km/s relative to the Earth, hits the Earth at the equator. It hits the Earth tangentially and in the direction of Earth's rotation...

When astronomers find an asteroid, how do they determine its distance from the sun? And for that matter, how do they determine its absolute velocity.

So had an idea the other day, and...Too make a gob of statements that started out incoherently seem coherent this is what I was thinking of doing: Take an asteroid (roughly 2 million pounds in weight) from the asteroid belt and place it in moon orbit. Please don't ask me about how I would...

http://www.guardian.co.uk/science/story/0,3605,1652178,00.html ---quote from Guardian--- Probe returning to Earth after asteroid landing Alok Jha Monday November 28, 2005 The Guardian The Japanese space probe Hayabusa began its journey home yesterday after becoming the first...

Consider a spherical asteroid with a radius of 5 km and a mass of 8.65x10^15 kg. (a) What is the acceleration of gravity on the surface of this asteroid? ANSWER: ___ m/s2 (b) Suppose the asteroid spins about an axis through its center, like the Earth, with an angular speed . What is the...

3 astronauts propelled by jetpacks are pushing a 120kg asteroid, exerting the forces shown: http://img463.imageshack.us/img463/1194/phys39at.png Find the acceleration in unit vectore notation! So Far i have: F1+F2+F3 = ma F1=(32N)i(cos30) , (32N)j(sin30) F2=(50N)i...

This was on my test and I took a guess because I was so confused. The question is that an asteroid hits Earth and now the Earth has a mass of 1.5 times its original mass and a radius of .75 times its original radius. What is its new force of gravity? its driving me crazy because it seemed...

OK, this is reported in the Website nkown as the "Unmuseum", and they specialise in the wierd. They've got stuff on Nesse, UFO's, etc., but they seem to have some integrity. So I'm reluctant to take their word for it, especially when the story is big enough that it should have made the news...

If you were to pass through our system's asteroid belt, what would you be able to see with the naked eye? We've all seen the Star Wars version, but that impresses me as more than a bit of dramatic hooey intended to provide excitement. In the real world, if you were to pass through our system's...

http://www.spacescience.com/headlines/y2000/ast08may_1.htm The asteroid, named 216 Kleopatra, is a large object in the main asteroid belt between Mars and Jupiter; it measures about 217 kilometers (135 miles) long and about 94 kilometers (58 miles) wide. Kleopatra was discovered in 1880, but...

http://science.nasa.gov/headlines/y2005/13may_2004mn4.htm?list45222 apparently they've crunched more numbers and can say that the asteroid will pass Earth at altitude of some 30,000 km shining like a 3rd magnitude star If I understand correctly, we are being told that it will pass Earth...

In this problem, you will estimate the cross section for an earth-asteroid collision. In all that follows, assume that the Earth is fixed in space and that the radius of the asteroid is much less than the radius R of the earth. The mass of the Earth is M_e, and the mass of the asteroid is m. Use...

Just curious, you know the movie armageddon? well, i was thinking, how big would an asteroid really have to be in order to wipe out all the life on earth? and, what're the calculations you'd do to figure that out? Thanks... ~gale~

How many ways are there to destroy a hostile asteroid coming towards the earth? What are they?

Does anyone know the calculation (asteroid size..etc), for an Asteroid hitting the Earth and causing a devastating Tsunami of the propotions as seen in Indonesia? It seems to me that I had heard that an Asteroid the size of a VW beetle, if hitting the Earth head on, and landing at the same...

What would be the best way to capture this asteroind and place it in a orbit about the Earth? It would be better to capture and study it then to just redirect it or destroy it. Imagine Earth with two Moons. http://www.space.com/scienceastronomy/asteroid_update_041227.html

Assume an asteroid's moon is 1.6 km wide, and 148 km from the center of the asteroid, which is 55 km long. The moon's orbit is circular with a period of 21 h. Whatis the mass of the asteroid? Ok This has to do with Kepler's Laws and I don't really understand Kepler's Law. I tried using...

I'm doing a very large, externally evaluated math project based on a supposed asteroid impact. The only problem is that I'm having a lot of trouble finding information regarding the average asteroid size, mass, orbital radius and speed, etc. Can anyone help out and maybe give some suggestions...

Ok, I keep trying to do the following problem: ----The asteroid Icarus orbits the Sun like the other planets. Its period is about 410 days. What is its mean distance from the Sun? (Hint: You can derive the mean distance with the paramters known for the Earth: Period of the Earth = 365 days...

"On Sept. 29, 2004 an asteroid the size of a small city will make the closest known pass of such a very large space rock anytime this century." "Toutatis looks something like a dumbbell hurtling awkwardly through space. It has a crazy rotation that makes normal days impossible. Scientists...

PASADENA, Calif. -- A 100-foot-diameter asteroid passed close but harmlessly by Earth on Thursday, astronomers said. The hurtling rock passed about 26,500 miles above the southern Atlantic Ocean at 3:08 p.m. MST. Astronomers were continuing to observe the asteroid, 2004 FH, which was...

http://www.newscientist.com/news/news.jsp?id=ns99994285

http://news.bbc.co.uk/2/hi/uk_news/3200019.stm

"Large meteorites are more likely to break up in the atmosphere before they hit the Earth than was previously thought, scientists in Britain and Russia have calculated." http://www.nature.com/nsu/030714/030714-11.html