The solar system is the sun and everything that orbits around it. It includes the planets and their moons as well as numerous asteroids and comets. These objects are all held in orbit around the sun by the sun’s strong gravity.
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The Secrets of Quantum Physics : Let There Be Life (Full Physics Documentary) | Spark
Professor Jim Al-Khalili traces the story of arguably the most important, accurate and yet perplexing scientific theory ever: quantum physics.
The story of quantum physics starts at the beginning of the 20th century with scientists trying to better understand how light bulbs work. This simple question soon led scientists deep into the hidden workings of matter, into the sub-atomic building blocks of the world around us. Here they discovered phenomena unlike any encountered before – a realm where things can be in many places at once, where chance and probability call the shots and where reality appears to only truly exist when we observe it.
Albert Einstein hated the idea that nature, at its most fundamental level, is governed by chance. Jim reveals how in the 1930’s, Einstein thought he’d found a fatal flaw in quantum physics. This was not taken seriously until it was tested in the 1960s. Professor Al-Khalili repeats this critical experiment, posing the question does reality really exist, or do we conjure it into existence by the act of observation?
Elsewhere, we explore how the most famous law of quantum physics – The Uncertainty Principle – is obeyed by plants and trees as they capture sunlight during the vital process of photosynthesis. Could quantum mechanics explain the greatest mystery in biology – evolution?
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Published: 2018-03-27 14:48:45
PLUTO AND BEYOND – A Traveler’s Guide to the Planets | Full Documentary
Pluto is so far away from Earth that it is a mere pinprick of light in our powerful telescopes. Learn what it would take for humans to journey to the uncharted limits of our solar neighborhood and what NASA scientists think we’ll find when we get there.
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Channel: space and astronomy
Published: 2017-04-27 08:34:13
Voyager Journey to the Stars
Cosmic Journeys examines the great promise of the Voyager mission and where it will lead us in our grand ambition to move out beyond our home planet. The two Voyager spacecraft are part of an ancient quest to push beyond our boundaries… to see what lies beyond the horizon. Now tens of billions of kilometers from Earth, two spacecraft are streaking out into the void. What will we learn about the Galaxy, the Universe, and ourselves from Voyager’s epic Journey to the stars?
December 19, 1972… the splashdown of the Apollo 17 crew capsule marked the end of the golden age of manned spaceflight. The Mercury…. Gemini… and Apollo programs had proven that we could send people into space… To orbit the Earth…. Fly out beyond our planet… Then land on the moon and walk among its ancient crater.
The collective will to send people beyond our planet faded in times of economic uncertainty, war, and shifting priorities. And yet, just five years after Apollo ended, scientists launched a new vision that was just as profound and even more far-reaching.
It didn’t all go smoothly. Early computer problems threatened to doom Voyager 2. Then its radio receiver failed, forcing engineers to use a back up. Now, after more than three and a half decades of successful operations, the twin spacecraft are sending back information on their flight into interstellar space. Along the way, they have revealed a solar system rich beyond our imagining.
The journey was made possible by a rare alignment of the planets, a configuration that occurs only once every 176 years. That enabled the craft to go from planet to planet, accelerating as they entered the gravitational field of one, then flying out to the next. The Voyagers carried a battery of scientific equipment to collect data on the unknown worlds in their path. That included a pair of vidicom cameras, and a data transfer rate slower than a dialup modem.
Published: 2013-04-06 14:35:11
Hidden Universe – Dark Matter – Full Documentary HD
In the 20th century, telescopes advanced greatly in size, with apertures of optical scopes expanding from just five feet to over 30, and radio dishes growing from 30 feet across to 1,000. Discoveries kept pace: We have mapped the Milky Way with its 100 billion stars, for instance, and now accept that the universe has billions of galaxies, many anchored by a supermassive black hole at the center. But to address some of the most pressing cosmological questions today—what is dark matter? dark energy? is there life elsewhere?—space scientists agree that we need much bigger and much better eyes on the sky.
NOVA examines how a simple instrument, the telescope, has fundamentally changed our understanding of our place in the universe. What began as a curiosity—two spectacle lenses held a foot apart—ultimately revolutionized human thought across science, philosophy, and religion. “Hunting the Edge of Space” takes viewers on a global adventure of discovery, dramatizing the innovations in technology and the achievements in science that have marked the rich history of the telescope.
Channel: Wisdom Land
Published: 2016-12-18 02:04:28
Animals Found FROZEN In Ice!
Check out these animals found frozen in ice! This top 10 list of amazing animals discoveries has some ancient animals that were frozen in time for eternity!
10. The Yuka Mammoth
The Yuka mammoth is one of the most well known and scientifically valuable animals that have ever been found. It was discovered in 2010 within the Siberian permafrost on the coast of the Laptev Sea in Russia. The most unusual thing about this 39,000-year-old mammoth was that it was mummified, and had the most in-tact mammoth brain ever found, with folds and blood vessels still visible.
Finding specimens like this is incredibly helpful to understanding the species. Studies of the brain showed it to be very similar to modern day elephants, and also led to researchers to developing better ways of storing mammoths in the future when new ones are found. Along with the Yuka mammoth, a number of other ones have been found in the region, although not in as good condition, and have been highly sought after by researchers for a different purpose.
Because of their relatively intact DNA, and their status as an intriguing extinct animal that is very similar to some that exist today, the mammoth is a great candidate for bringing a species back from extinction using cutting edge technology. It is believed that with a bit of luck and perseverance, we might once again see these giants alive and well, and maybe within just a few years! I would definitely love to see that!
It’s rare enough to find an animal preserved in ice, but rarer still is the apparent freezing of two animals when they’re interacting with each other. Well this is what a couple of hikers found in Alaska in 2016.
Beneath 8 inches of ice was the stunning sight of two moose fighting each other, clearly so engrossed in their tussle that they failed to notice the approaching frost. In the fall, males tend to be more aggressive towards each other, likely due to territorial disputes or to gain the attention of a female, and at some point these two managed to get their antlers tangled. They probably drowned in the cold water before being frozen over as temperatures fell.
Soon after their discovery, the moose were removed from the ice by local enthusiasts who wanted to preserve the unusual find forever.
As a fish living in water, ice can be both a blessing and a curse. It’s the unique property of ice floating on top of water that helps to insulate warmth and allow fish to survive falling temperatures, but they aren’t always so lucky. In 2014, a sharp cold eastern wind sent temperatures plummeting very quickly around the island of Lovund in Norway, and instantly froze parts of the ocean.
Unfortunately for a large shoal of fish, thought to be attempting to escape a predator at the time, there was no chance to avoid the approaching ice, and they were frozen in place. The ice sheet was so thick that it was perfectly safe for people to walk across, and capture these amazing images of thousands of fish frozen in time.
This event had a major impact on the local ecosystem, because birds were unable to find any food, so the skies were strangely silent until the ice finally thawed.
Siberia is one of the coldest places on earth that has been regularly inhabited for millennia. This makes it the perfect place to find frozen animals like the Yuka mammoth, and close by there was another discovery in 2011, the mummified remains of a Steppe Bison- the ancestor to the modern bison. Discovered by a tribe in the Yana-Indigirka Lowland, the bison was remarkably intact, with its brain and other organs almost perfectly preserved.
This is the most complete Steppe Bison ever to be found, and has allowed researchers to extensively study its brain, heart, digestive system and blood vessels, despite it being well over 9000 years old. With no visible signs of injury, it is thought that the lack of body fat around its abdomen is a clue as to how it died. Most likely from starvation as a result of the rapidly changing environment in the area at the time.
6. Selerikan Pony
In 1968, gold miners digging tunnels, about 30 feet below the surface of the Indigirka River in Siberia, found something surprising- two legs and a tail of a pony sticking through the roof of one of their tunnels. Experts were called in from the Zoological institute of St. Petersburg to help recover the full animal, which they managed to do, apart from its head.
The body turned out to be of a Przewalski (prez walski) Horse, that nowadays is only found in Mongolia, and amazingly this one appeared to have died about 35,000 years ago. Analysis of the remains suggested that the horses lived relatively similar then to how they still do today.
Origins Explained is the place to be to find all the answers to your questions, from mysterious events and unsolved mysteries to everything there is to know about the world and its amazing animals!
Channel: Origins Explained
Published: 2017-11-14 22:35:01