 | Ever since Princeton physicist John Wheeler coined the term nearly 50 years ago, black holes have evoked a sense of mystery and wonder for astronomers and space enthusiasts. But unlike comets, stars and other beautiful objects in the night sky, black holes can't actually be seen -- they trap light, after all. From this infinitely dark void, myths and misconceptions have taken flight, spurred by the sci-fi depictions of black holes as cold cosmic villains with a bottomless appetite for nearby planets, stars and mighty spacecrafts whizzing through the galaxy at warp speed. Even though black holes don't behave like the celestial monsters with insatiable appetites they're sometimes caricatured to be, there is still plenty of wonder and unanswered questions about them to satisfy astronomers for years to come. For example, scientists have distinguished between two major classes of black holes -- stellar black holes (also known as stellar-mass black holes) and supermassive black holes. The former are roughly six to 30 times the mass of the sun and the latter are a whopping million to billions of times the mass of the sun. So are there intermediate-mass black holes, on the order of hundreds to thousands of times the mass of the sun? Quite possibly, yes. In August, a team from Keio University in Japan announced their discovery of a region of space 30000 light years away which they suspect might contain young, intermediate-mass black holes. One of these black hole candidates is <b>...</b> | Views: 8  1 ratings |
| Time: 10:39 | More in Science & Technology |
Saturday, October 13, 2012
NuSTAR
video about telescope
telescope
Software de terapia visual y diagnostico COIVision
video about binoculars
binocular
 | Programa informativo COIVision dirigido a optometrístas que trabajas en terapia visual y visión deportiva. Con funciones de diagnostico de AV , CSF, y test de visión binocular. Entrenamiento para problemas de aprendizaje, coordinación ojo-mano, memoria, tiempos de reacción, visión periférica, visión binocular. etc Categoría: | Views: 0  0 ratings |
| Time: 08:54 | More in Science & Technology |
Skywatcher N 130/900 Explorer EQ2 (Unpacking and assembly)
video about telescope
telescope
 | First look at the telescope 130/900 explorer, from Skywatcher. (the cat is not included !) www.skywatcher.com Thank for watching. | Views: 0 0 ratings |
| Time: 05:25 | More in Science & Technology |
News unleashedvision
video about microscope
microscope
 | Microscopic Crystals in the NEWS The TH Saunders Open Collections - Demanding Attention - Inspiring Imagination - Sustaining Interest. Each image is captured using highly specialized photomicroscopes. The crystals themselves are no larger than the point of a pin. All the color you see is natural, exactly as it appears in the microscope. | Views: 1 0 ratings |
| Time: 02:47 | More in Science & Technology |
The WOW Signal - Stephen Hawking's Universe [HD]
video about telescope
telescope
 | " The "Wow!" source radio emission entered the receiver of the Big Ear radio telescope at about 11 : 16 pm Eastern Daylight Savings Time on August 15, 1977. The Wow! signal was a strong narrowband radio signal detected by Dr. Jerry R. Ehman on August 15, 1977, while working on a Search for Extra-Terrestrial Intelligence SETI project at The Big Ear radio telescope of Ohio State University. The signal bore expected hallmarks of potential non-terrestrial and non-solar system origin. It lasted for a total of 72 seconds, the full duration Big Ear observed it, but has not been detected again. Much attention has been focused on it in the media when talking about SETI results. Both the length of the Wow! signal, 72 seconds, and its shape corresponds to an extraterrestrial origin but its source remains unexplained. The region of the sky in which the signal was heard, lies in the constellation Sagittarius, roughly 2.5 degrees south of the fifth-magnitude star Chi-1 Sagittarii. Since then, its never been heard again. " BigEar " Destroyed In late 1997, after almost 40 years of operation, the Ohio State University Radio Observatory, with its "Big Ear" radio telescope, ceased operation. The land on which the observatory was sitting (owned by the Ohio Wesleyan University, Delaware, Ohio) was sold by them in 1983 to land developers who later claimed their rights to develop the land. The telescope was destroyed in early 1998. An adjacent 9-hole golf course was expanded into 18 holes and <b>...</b> | Views: 29 1 ratings |
| Time: 01:57 | More in Science & Technology |
James Webb Telescope mission perspective
video about telescope
telescope
 | James Webb Telescope will have a bigger mission perspective than any other mission so far! | Views: 0 8 ratings |
| Time: 11:08 | More in Science & Technology |
Microscope- Mads Langer (Cover)
video about microscope
microscope
 | Microscope by Mads Langer Covered by Hannah Green | Views: 61 4 ratings |
| Time: 03:16 | More in Music |
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