- published: 23 Feb 2015
- views: 127475
Asteroids are minor planets, especially those of the inner Solar System. The larger ones have also been called planetoids. These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disc of a planet and was not observed to have the characteristics of an active comet. As minor planets in the outer Solar System were discovered and found to have volatile-based surfaces that resemble those of comets, they were often distinguished from asteroids of the asteroid belt. In this article, the term "asteroid" refers to the minor planets of the inner Solar System including those in co-orbit with Jupiter.
There are millions of asteroids, many thought to be the shattered remnants of planetesimals, bodies within the young Sun's solar nebula that never grew large enough to become planets. The large majority of known asteroids orbit in the asteroid belt between the orbits of Mars and Jupiter, or are co-orbital with Jupiter (the Jupiter trojans). However, other orbital families exist with significant populations, including the near-Earth asteroids. Individual asteroids are classified by their characteristic spectra, with the majority falling into three main groups: C-type, M-type, and S-type. These were named after and are generally identified with carbon-rich, metallic, and silicate (stony) compositions, respectively.
The Earth has been getting hit by asteroids and comets for its whole life. The planets formed from collisions of smaller objects, and even our water may have come largely from comets. Heavy bombardments may have continued until as recently as 4 billion years ago, making it difficult for life to get a foothold at all (the "Late Heavy Bombardment"). There are a lot more small rocks than big ones. So while Earth is constantly being "hit" -- accumulating over 100 tons of matter ever day -- most of this is in the form of dust or tiny sand-grain sized meteors that appear as shooting stars. By comparison, school bus-sized asteroids may hit every thousand years or so, medium sized (say 300 meter) asteroids might be once every 50,000 years, and extinction level events only every billion years. And ...
In the clip from Last Days of the Dinosaur we learn how the asteroids really killed the dinosaurs... For more information on Asteroid Day please visit: www.yourdiscoveryscience.com Subscribe: youtube.com/user/yourdiscoveryscience?sub_confirmation=1 Like us: Facebook.com/yourdiscoveryscience
● Discovery Channel - Large Asteroid Impact Simulation (2008). Earth was born as a result of repeated asteroid collisions, the moon was created by a single giant impact event. Then, Earth's size attracted huge meteorites, which slammed into it, causing super-high-temperature rock vapour to cover the entire surface and evaporate all ocean water. The earliest life-forms survived such infernal events by escaping deep into the ground, miraculously emerging again and again. The Earth has gone through innumerable catastrophic events, and life has survived by acquiring new abilities to live through each crisis. Humans are part of the grand history of life's evolution, which has been closely intertwined with repeated cataclysmic events. Learn what would happen if an asteroid hit the Earth with t...
Every year, thousands of objects both natural and manmade plummet through our atmosphere and crash into the Earth. These menacing messengers from the sky provide scientists with amazing insights into the natural, and not so natural, phenomena. The Universe is full of explosions that both create and destroy. The Chicxulub impact on the Yucatan peninsula, which may have wiped out the dinosaurs 65 million years ago, was two million times more powerful than the largest nuclear bomb ever detonated.
Welcome to Top10Archive! Everyday that mankind gets to enjoy life to its fullest is a day where mankind is paying no mind to the dangers that threaten them from space. Minor planets and planetoids threaten the very existence of Earth on a frequent basis - so frequent, in fact, that it is scary. Over the past several decades alone, the people of Earth have been threatened by a slew of asteroids - and these ten are amongst the most life-threatening, should they have changed trajectory and slammed into the blue planet. To put these distances into perspective, our moon is roughly 239,000 miles or 384,000 kilometers from earth. Support us by shopping on Amazon! http://tinyurl.com/njwyzzn Check out our website: http://www.top10archive.net Follow Us on Twitter: https://twitter.com/top10archives ...
WhiteHouse Science Director Warns of Asteroid vulnerability in meeting with NASA Goddard Space Center on September 14, 2016. Meanwhile 2016 QL44 makes its close approach to earth as a condition code 8. http://www.space.com/34070-earth-vulnerable-to-major-asteroid-strike.html NASA https://www.youtube.com/watch?v=vWZ_ElEIf8Y My last video on QL44 https://www.youtube.com/watch?v=rb0CTHpIDvI http://neo.jpl.nasa.gov/
Now that we’ve finished our tour of the planets, we’re headed back to the asteroid belt. Asteroids are chunks of rock, metal, or both that were once part of smallish planets but were destroyed after collisions. Most orbit the Sun between Mars and Jupiter, but some get near the Earth. The biggest, Ceres is far smaller than the Moon but still big enough to be round and have undergone differentiation. CORRECTION: In the episode we say that 2010 TK7 is 800 km away. However, 2010 TK7 stays on average 150 million kilometers from Earth, but that can vary wildly. Sorry about that! -- Table of Contents Asteroids Are Chunks of Rock, Metal, or Both 1:45 Most Orbit the Sun Between Mars and Jupiter 7:16 Ceres is Far Smaller Than the Moon, But Large Enough to be Round 3:43 -- PBS Digital Studios: h...
Meteors, Asteroids, Meteorites and Fireballs sightings compilation from around the World over the last couple of years with the latest Asteroid to come close to earth named Asteoid 2013 TX68. This was predicted to arrive and fly by earth on March 5 2016 but the date has been moved forwards by some to March 8 2016. Distance from earth as it flies by is variable based on current calculations. Chance of impact is unlikely but can't be ruled out. Other meteors and fireballs featured are a couple over Thailand both at day and at night, some over Europe, the famous Russian meteor that impacted in 2013, Texas and California meteors and the recent Scotland Meteor sighting in February 2016. Are these meteors and asteroids a warning of End Times and Bible Prophecy and what is to come, or is it bus...
Breaking News Alert: One thousand asteroids are headed towards earth its the panic world wide nowhere to hide. Music & Video by Gagare1952 MUSICNEWS NETWORK.
A million miles away
We can run, we can be lost in space
Counting down from ten
With a spark we can start our life again
Who says we can't fly, fly away
Who says we can't run, run away...
With the asteroids!
Writing off our friends
All alone we are lost again
Writing off our pain, cause we run, run away...
With the asteroids!
Please don't you ever crash, or or fly or stay in space
Please don't you ever crash, or or try and save the day
Away and away and you watch me
Touch down, I won't stay
Away and away and you want me...to stay
Counting down the days
We can run, we can be lost in space
Falling off the end
With a spark we can start our life again
Who says we can't fly, fly away
Who says we can't run, run away...
With the asteroids!
Please don't you ever crash, or or fly or stay in space
Please don't you ever crash, or or try and save the day
Away and away and you watch me
Touch down, I won't stay
Away and away and you want me...but I cannot stay!!
Release my wings, please cut these strings
So I can fly, and fly, and fly...away
She says she wants me to stay
She says she wants me to stay
She says she wants me to stay