Comets And Meteor Showers
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- Опубликовано: 3 авг 2010
- / sciencereason ... NASA: Comets And Meteor Showers (Perseid Meteor Shower).
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Have you ever wondered what makes these cosmic fireworks? Meteor showers are just colorful debris of a passing comet or occasionally , the debris from a fragmented asteroid. When a comet nears the sun, its icy surface heats up. This causes clouds of gas, dirt and dust to be released, forming a tail of debris that can stretch for millions of miles.
As Earth passes near this dusty tail, some of the small dust particles hit our atmosphere. They burn up and create great celestial fireworks for us to enjoy.
NASA generates meteor shower forecasts to prevent potential hazards to spacecraft that are launching and orbiting Earth. NASA also monitors these showers to check the accuracy of the forecasts.
You can learn about all of NASA's missions at www.nasa.gov.
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Rocks and Ice in the Solar System
Our Solar System consists of the Sun, planets, and moons, but it also contains a multitude of smaller chunks of rock and ice. These objects were left over from the time when our Sun and Solar System formed.
So where are all of these small neighbors? Millions of rocky chunks called asteroids orbit in a region between the four rocky inner planets and the four outer gas giant planets. The Dawn mission is currently on its way to investigate Ceres and Vesta, two of the largest asteroids. Beyond Neptune, there is another swarm of objects made mostly of ice and dust. This is the disc-shaped region known as the Kuiper Belt, the origin of many comets. Some comets originate even farther out, from a giant shell of objects near the edge of the Solar System known as the Oort Cloud.
Our Solar System consists of the Sun, planets, and moons, but it also contains a multitude of smaller chunks of rock and ice. These objects were left over from the time when our Sun and Solar System formed.
So where are all of these small neighbors? Millions of rocky chunks called asteroids orbit in a region between the four rocky inner planets and the four outer gas giant planets. The Dawn mission is currently on its way to investigate Ceres and Vesta, two of the largest asteroids. Beyond Neptune, there is another swarm of objects made mostly of ice and dust. This is the disc-shaped region known as the Kuiper Belt, the origin of many comets. Some comets originate even farther out, from a giant shell of objects near the edge of the Solar System known as the Oort Cloud.
nightsky.jpl.nasa.gov/docs/08I... 
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@AutodidacticPhd
On a related note, the "asteroid belt" was hypothesized due to an inherently flawed numerological model of planetary spacing that ignored the "outer planets". This model was subsequently abandoned, but its prediction of a planet between Mars and Jupiter persisted. When no planet was found, but instead asteroids, it was dubbed the "asteroid belt", without any consideration of the actual density of objects or comparisons to other regions of the solar system.
Good video, I hope a rare meteorite lands safely where i can find it!
@AutodidacticPhd
I've already done the research. The flux density of objects in "near Earth" regions of the solar system is an order of magnitude larger than in the "asteroid belt". This isn't surprising, since the "asteroid belt" is vastly huge compared to "near Earth" regions. Again, we're talking about density of objects, not the sheer number of objects. The "near Earth" region of the solar system is much more densely populated, and this is OBSERVED, not assumed.
@Kenjineering In case anyone's wondering, this is just gibberish, it's spam. abcderqwtyz posted a i u e o, the five vowels in Japanese, and Kenjineering posted ka ki ku ke ko, the next five characters in the Japanese alphabet.
meteor showers are so beautiful
Very nice Vid ;)
Thumbs up
Thank you N.A.S.A. Can wait to know a little bit more of our fantastic Universe. Un millon de gracias. LOVE N.A:S.A
Good video!
The video also makes the claim comets have "icy surface". Direct observations and sample collection from comets shows quite clearly and convincingly that comets have a rocky surface, as well as a rocky interior. Comets are rocks, not balls of ice sublimating from solar heating.
The video also shows a "belt" of densely populated asteroids between Mars and Jupiter, we know from observation that "near Earth" regions are more densely populated with objects.
@zx1011 same goes for anyone on TV, like news reporters
@SuperiorApostate Yeah, I was wondering how long it would take our resident crazies to come out and tell us all about how meteors are a purely EM phenomena.
wow space is really weird its unbelievable
@zx1011 So you can look them up. If you just want to swallow everything you hear on TV or RUclips wholesale, I guess it doesn't matter. However, some of us like to check sources any time something sounds fishy or new.
Additionally, the point of these, rather elementary videos, is to get people interested in science and let them know that the scientific organizations and institutions they pay for are doing something they can appreciate directly.
@fertilizerspike Also, (unless you can provide a reasonable source that says otherwise) even if you include the centaurs, Near Earth Objects, Lagrange objects of the Jovian planets and other miscellaneous Small Solar System Bodies, the region between Mars and Jupiter still remains the most densely populated collection of SSSBs, and even though it is early days for the Kuiper Belt, the number of observed objects fitting the description of KBOs is easily living up to prediction.
@fertilizerspike "Direct observations and sample collection from comets shows..."
Source?
@AutodidacticPhd
I was wondering how long it would take our resident crazies to come out and tell us all about how there is no electricity in space, and everything is explained by "gravity".
. . . . : that starsign, what is it?
@zx1011 Relax, it is a formality.
where's fertilizerspike with his brilliant ideas why gravity does not exist..?
@owchywawa kinda, but she doesn't have that indescribably annoying back of the throat talk.
@AutodidacticPhd
Feel free to do your own research to verify the claims. It's enough work for me simply to correct all your errors and the errors of others. No source I could give you would convince you, anyway, since you've rejected every single source of information that I've provided to verify the claims I've made. Do your own research, convince yourself, or remain ignorant. It's your choice, you make it.
@AutodidacticPhd
As I've stated to you several times here and elsewhere, I've tried my best to point you in the right direction so you can discover this information for yourself. You refuse to do the leg work. I can't force you to learn. I've given you dozens (if not hundreds by now) of sources, you ignore them. That's your fault. And I address people the way they address me. If they stick to the subject, so do I. If they try to discuss me, I hit them in the face with both barrels.
@fertilizerspike Yeah yeah, someone has you pegged, so you resort to vulgarity and name calling. When you cough up a source, we may have something to talk about, but as it stands you are obviously much more interested in antagonism than anything resembling an intelligent exchange of ideas.
@scfcsmithy ....space is lame
@fertilizerspike Funny, I've never said anything about there being NO EM phenomena in space, nor that gravity is the sole explanation for observed phenomena... You however have made MANY claims, not one of which you have properly sourced or cited. Your spurious attack has no basis... somewhat like your wild, and as yet unsupported rantings about astronomy.
why do the narrators feel the need to tell us who they are and where they are from? Do they think anyone (but them of course) gives an honest to God (sorry science) fuck?