An asteroid discovered on Jan. 7 flew by our planet on Jan. 9 at about half the distance that the moon is from Earth
2 год назад
It’s here! Science stuff, mind-blowing stuff, Vsauce stuff, oh my!! THE CURIOSITY BOX: https://www.thecuriositybox.com/ Jake’s video about The Curiosity Box: https://www.youtube.com/watch?v=p91-GhjgeEU Minute Physics on why December days are the longest: https://www.youtube.com/watch?v=nZMMuv0Ltyo StandUpMaths on calendars and leap days: https://www.youtube.com/watch?v=qkt_wmRKYNQ Tom Scott on the Equation of Time: https://www.youtube.com/watch?v=d9Qnobvx_kM My video on what would happen if the Earth stopped spinning: https://www.youtube.com/watch?v=K0-GxoJ_Pcg GREAT visuals showing how Earth moves around the sun: https://www.youtube.com/watch?v=82p-DYgGFjI http://www.timeanddate.com/ George Washington’s birthday: https://www.archives.gov/legislative/features/washington/ real-time sub solar point location: http://rl.se/sub-solar-point Lahaina noon images from the Oahu Astrophotography club: https://www.facebook.com/OahuAstrophotoClub analemma: https://en.wikipedia.org/wiki/Analemma great solargraph and analemma images: http://analemma.pl/english-version interactive seasons and ecliptic simulator: http://astro.unl.edu/classaction/animations/coordsmotion/eclipticsimulator.html Nasa video of seasonal movement of Earth: https://svs.gsfc.nasa.gov/20063 Tropical year: https://en.wikipedia.org/wiki/Tropical_year Earth rotation specifics: https://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=20196 How Earth moves through the universe: https://astrosociety.org/edu/publications/tnl/71/howfast.html http://www.slate.com/blogs/bad_astronomy/2013/03/04/vortex_motion_viral_video_showing_sun_s_motion_through_galaxy_is_wrong.html http://space.gizmodo.com/racing-while-standing-still-1558642922/1559622011 https://www.reddit.com/r/askscience/comments/1rhu7r/i_always_see_representations_of_the_solar_system minute physics on cab: https://www.youtube.com/watch?v=_mZQ-5-KYHw PBS spacetime on the cosmic microwave background: https://www.youtube.com/watch?v=3tCMd1ytvWg https://www.youtube.com/watch?v=wcBjibuHxEk CMB rest frame: http://physics.stackexchange.com/questions/25928/is-the-cmb-rest-frame-special-where-does-it-come-from https://www.reddit.com/r/AskPhysics/comments/2va4t6/does_no_absolute_reference_frame_contradict_the/ Wikipedia: https://en.wikipedia.org/wiki/Day https://en.wikipedia.org/wiki/Solar_time https://en.wikipedia.org/wiki/Sidereal_time https://en.wikipedia.org/wiki/Calendar https://en.wikipedia.org/wiki/Gregorian_calendar https://en.wikipedia.org/wiki/Calendar_reform https://en.wikipedia.org/wiki/Day_length_fluctuations https://en.wikipedia.org/wiki/Cosmic_microwave_background wikicommons images: https://en.wikipedia.org/wiki/Sundial#/media/File:Kew_Gardens_0502.JPG https://en.wikipedia.org/wiki/File:CathedralofLearningLawinWinter.jpg https://en.wikipedia.org/wiki/Miami_Beach,_Florida#/media/File:South_Beach_20080315.jpg To explore space, I highly recommend these: http://www.shatters.net/celestia/ http://en.spaceengine.org/ music by http://www.youtube.com/jakechudnow and http://www.audionetwork.com Awesome 3D graphics by Eric Langlay: https://www.youtube.com/user/ericdraven30 Lame 2D stuff by me.
1 год назад
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2 год назад
Impact Craters on Earth, Moon and other planets provide evidence that the Earth has been struck by asteroids since it formed roughly 4.5 billion years ago. Once every few million years, an object large enough to threaten life on Earth comes along. Meteorite specialist Denton Ebel, Curator in the Division of Physical Sciences, provides a brief history of impacts from the early days of the solar system to the impact that might have led to the demise of most dinosaurs on the planet. ASTEROID CRASH COURSE Asteroids can be hazardous to life on Earth, but they also provide clues about the early solar system. In the Asteroid Crash Course video series, Denton Ebel, curator in the Museum's Division of Physical Sciences, explains how asteroids formed and the varying degrees of destruction they cause when they fall to Earth. What is an Asteroid? https://youtu.be/LopiH8cXtkI Meteorite, Meteor: What’s the Difference? https://youtu.be/9NASWzKQ-2I Why Are There No Planets in the Asteroid Belt? https://youtu.be/3D93vl15-54 Can Asteroids Be Deflected? https://youtu.be/iVJPf_dqQyc What Happens When Large Meteorites Fall to Earth? https://youtu.be/jm_NHMPnv34 How Are Large Asteroids Tracked? https://youtu.be/JGtKyYxmvpY VIDEO CREDITS: VIDEO AMNH/J. Bauerle VISUALIZATIONS “Cosmic Collisions” by AMNH/Denver Museum of Nature & Science/GOTO, Inc. Tokyo, Japan/Shanghai Science and Technology Museum, China AMNH/Department of Exhibition NASA/ Goddard Space Flight Center/Lunar Reconnaissance Orbiter PHOTOGRAPHY AMNH/D. Finnin AMNH/S. Thurston NASA TTÜ/Gennadi Baranov Cardiff University/Ian McMillan United States National Park Service Wikimedia Commons/wilson44691 MUSIC “Scrape the Sky” by Ben Worley and Matt Morris/ Warner Chappell Production Music COSMIC COLLISIONS Cosmic Collisions was developed by the American Museum of Natural History, New York, in collaboration with the Denver Museum of Nature & Science; GOTO, Inc., Tokyo, Japan; and the Shanghai Science and Technology Museum, China. Made possible through the generous support of CIT. Cosmic Collisions was developed by the American Museum of Natural History with the major support and partnership of National Aeronautics and Space Administration, Science Mission Directorate, Heliophysics Division, grant number NNG04GC18G.
8 год назад
Just about every two years, the planet Mars makes its closest approach to Earth... around 36 million miles. That's when we pack our robotic emissaries off to the Red Planet, timing their launches to spend the least effort to get there. Some fly around it... snapping pictures... Others land ... to sample its surface.... ...a few to crawl around its canyons and craters. These probes may pave the way for human explorers... and, perhaps permanent settlers... who'll dig deeper still... in search of answers to our most pressing question: Did Mars develop far enough -- and stay that way long enough -- for life to arise? And, if so, does anything live now within Mars' dusty plains... beneath its ice caps... or maybe somewhere underground? Mars does not give up its secrets easily ... it's almost as if the little planet is embarrassed. Over a century ago, a few observers thought they saw clues that Mars is alive. In 1877, the Italian astronomer Giovanni Schiaparelli noted markings... which he saw as a latticework of lines. He called them "canali" in Italian... meaning nothing more than "shallow channels" in English. American astronomer, Percival Lowell, found the lure of these features irresistible. He saw Schiaparelli's channels as artificial canals. He speculated that they carried melting snow from the poles to the dry interior. After all, on Earth, the Suez Canal had recently opened to ship traffic. The Panama Canal was beginning to be dug. The Martian canals, Lowell said, were built by a sophisticated society confronting an environmental catastrophe on the grandest of scales. Those Martians, he thought, must face urgent choice: move water across vast arid regions, or perish on an increasingly dry planet. As the 19th Century gave way to the 20th, Lowell took his case to the public, in a series of three best-selling books. And the public responded with... questions. Who were these Martians, who had the means to remake an entire planet? Some offered schemes for making contact. Giant mirrors would flash greetings... Light beams... Mental telepathy. Many astronomers grew deeply skeptical... but Lowell's vision of a harsh, yet Earth-like planet endured in the public's imagination.. That vision was dealt harsh blow in 1964. The Mariner Four spacecraft ventured in for a closer look... And what it saw looked like the Moon. Three more Mariners followed. They found huge dormant volcanoes... the deepest and longest canyon in the solar system...but not a trace of life, present or past. In the mid-1970's, two lander-orbiter robot teams, named Viking, took up residence at Mars. Maybe the Martians were just hiding, so theVikings tested the soil for signs of life. But all the evidence from Viking told us... Mars is not only barren... but in fact hostile to life. It's no wonder. Martian air temperatures range from --20 degrees Fahrenheit to down below --200. It's also very, very dry. The Sahara Desert on Earth is a rainforest, by comparison. If all of the water vapor in Mars' thin atmosphere fell as snow, it would make a layer of frost not thicker than your fingernail. On Earth, impact craters erode over time from wind and water... and even volcanic activity. On Mars, they can linger for billions of years. But so can the imprint of riverbeds, lake bottoms and ocean shorelines... And the Viking orbiters saw a lot of them. It's not hard to believe that a great deal of water once flowed here. But where did all the water go? To find out, scientists needed to do real field-geology on Mars. They needed rovers... travelling robots with tools and instruments.
1 год назад
On Jan. 4, NASA announced the selection of two missions to explore previously unexplored asteroids. The first mission, called Lucy, will study asteroids, known as Trojan asteroids, trapped by Jupiter’s gravity. The Psyche mission will explore a very large and rare object in the solar system’s asteroid belt that’s made of metal, and scientists believe might be the exposed core of a planet that lost its rocky outer layers from a series of violent collisions. Lucy is targeted for launch in 2021 and Psyche in 2023. Both missions have the potential to open new windows on one of the earliest eras in the history of our solar system – a time less than 10 million years after the birth of our sun.
1 год назад
An asteroid doesn't need to be massive to cause serious damage. The Chicxulub asteroid that wiped out the dinosaurs is estimated to have been about 6 miles in diameter. That may sound like a pretty big space rock, but relative to Earth it's pretty tiny. But what's the likelihood of an asteroid of that size coming into contact with Earth again? The following is from NASA's website: "Every day, Earth is bombarded with more than 100 tons of dust and sand-sized particles. About once a year, an automobile-sized asteroid hits Earth's atmosphere, creates an impressive fireball, and burns up before reaching the surface. Every 2,000 years or so, a meteoroid the size of a football field hits Earth and causes significant damage to the area. Only once every few million years, an object large enough to threaten Earth's civilization comes along. Impact craters on Earth, the moon and other planetary bodies are evidence of these occurrences." -------------------------------------------------- Follow BI Video on Twitter: http://bit.ly/1oS68Zs Follow BI on Facebook: http://bit.ly/1W9Lk0n Read more: http://www.businessinsider.com/ -------------------------------------------------- Business Insider is the fastest growing business news site in the US. Our mission: to tell you all you need to know about the big world around you. The BI Video team focuses on technology, strategy and science with an emphasis on unique storytelling and data that appeals to the next generation of leaders – the digital generation.
3 год назад
A number of people who've seen NASA's annual lunar phase and libration videos have asked what the other side of the Moon looks like, the side that can't be seen from the Earth. This video answers that question. The imagery was created using Lunar Reconnaissance Orbiter data. This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/goto?4253 Like our videos? Subscribe to NASA's Goddard Shorts HD podcast: http://svs.gsfc.nasa.gov/vis/iTunes/f0004_index.html Or find NASA Goddard Space Flight Center on Facebook: http://www.facebook.com/NASA.GSFC Or find us on Twitter: http://twitter.com/NASAGoddard Related video: https://www.youtube.com/watch?v=tmmyu88wMHw
4 год назад
Trivia: Saturn's rings were created using Voyager data and Cassini Data, and tables from the IAU, and nasa Interestingly enough, the voyager data and Cassini data did Not completely match each other, More interestingly the differences between the two data sets were not consistent along the ring, specifically the small Gaps along the rings are inconsistent between voyager and cassini. there are 3 conclusions i can reach from this, 1, the data is simply not perfectly accurate, 2, I interpreted the data incorrectly, 3, the Rings have actually changed a bit between voyager and cassini. To create the rings, I interpolated between the two data sets, so the rings are a mix between voyager and cassini data, there are multiple textures used, for scattering, translucency, transparency, and color, I think I probably have some of the highest resolution textures in use anywhere on the web(over 19k pixels across), in Part 1, (the 2d blue print video)the Planets are all correctly scaled to each other, except the SUN.. The Orbits are also all correctly scaled to each other (except the Moon's)However the planet size, and the planet orbits are not scaled to each other. The orbital speeds are also all correct relative to one another, In part 2, The illumination between the moon and Saturn is reasonably accurate, In case you didn't understand, This is Saturn as Far away as the closest approach mars would get in Part 3, the meteors ramp up and down in response to going through the very distended outer rings E, and G the Meteors are Greenish, I've actually seen a Number of large daylight meteors, all of them had flashes of green and blue, The velocity and direction they are in the video is accurate to the motion of Saturn in this video Disclaimer: This will.. never never ever happen, ever (probably).