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Old February 3rd, 2013, 05:34 PM   #1241
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Old February 3rd, 2013, 06:21 PM   #1242
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I saw that. :3 I live and love Vsauce!
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Old February 3rd, 2013, 08:53 PM   #1243
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Yep, Vsauce ( and Vsauce2 and 3 ) are some of the best Youtube channels
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Old February 3rd, 2013, 09:04 PM   #1244
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Quote:
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Yep, Vsauce ( and Vsauce2 and 3 ) are some of the best Youtube channels
Scishow, CrashCourse, vlogbrothers and minutephysics too!
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Old February 3rd, 2013, 10:12 PM   #1245
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Im a subscriber on almost all of those except vlogbrothers :p Ill have to check that out
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Old February 4th, 2013, 10:54 PM   #1246
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Mars Surface Now 90% Mapped in 3D

Mapping the surface of Mars in 3D is now 90% finished by the high-resolution stereo camera on the European Space Agency's Mars Express, about 9 years after the orbital insertion of the satellite.

The mosaic of the map consists of 2702 individual swaths of the martian surface, providing a record of all locations observed by the camera simultaneously in red, green, blue and nadir channels. Making those took the satellite 10 821 orbits, with 61.5% of the surface now mapped in high-resolution of 20 m per pixel or better. One of the more spectacular results came out this January with detailed and plastic topographical images of an ancient river valley (images of raw data and animation added below).



Upon closer inspection, many well-known geological features are revealed. Towards the top left stands Olympus Mons, the tallest volcano in the Solar System at over 21 km high. A chain of three volcanoes making up the Tharsis Montes lies just below and to the right.

Moving further right again uncovers the Solar System's largest canyon, Valles Marineris. This giant cavern plunges 10 km deep and runs over 4000 km.

Assuming that good atmospheric conditions coincide with the appropriate orbits, Mars Express scientists hope that they might fill in the remaining gaps in the map in the coming years - although the current mission extension is running out in 2014.
http://www.scienceworldreport.com/ar...-mapped-3d.htm
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Old February 13th, 2013, 03:51 AM   #1247
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Gaia mission will reveal the secrets of ultra-cool dwarfs



Among the hundred billion stars which can be observed in the Milky Way, there is a group of stars, the so-named ultra-cool dwarfs, defined as stars with a temperature below 2500 K, which includes ultra-cool dwarfs and brown dwarfs. It is a really interesting group: they are the most ancient objects in our Galaxy and, therefore, they can provide information about its primitive chemical composition. This is one of the objectives of Gaia mission which will be launched at the end of 2013 by the European Space Agency.

When observing them, they seem quite similar, but there are clear differences between brown dwarfs and ultra-cool dwarfs: brown dwarfs do not reach the temperature they need to produce the nuclear reactions which characterize ultra-cool dwarfs. It could be said that brown dwarfs are failed stars because they lack mass.

A study published on the journal Astronomy & Astrophysics ("Properties of ultra-cool dwarfs with Gaia"), led by the National University of Distance Education (UNED) and in which researchers from the Institute of Cosmos Sciences of the University of Barcelona (ICCUB) participated, has developed a method that will allow Gaia to detect tens of ultra-cool dwarfs in the Milky Way. The method to estimate physical parameters of these objects, such as temperature or gravity, has also been validated. Researchers have used data mining techniques to make estimations taking into account the parameters that Gaia can measure and its design characteristics. This method highly improves the accuracy of data, so the estimation of ultra-cool dwarfs’ temperature will have a little margin of error. This improvement in accuracy will also increase considerably the number of ultra-cool dwarfs detected.

However, only few tens of those which show a temperature lower than 1500K and weak bright in the wavelengths observed by Gaia could be detected.
The National University of Distance Education, the Astrobiology Center (CSIC-INTA), the University of Cádiz, and the German-Spanish Calar Alto Observatory participate in the research too.

Gaia mission

Gaia will conduct a census of a thousand million stars in our Galaxy, monitoring each of its target stars about 70 times over a five-year period. It will precisely chart their positions, distances, movements, and changes in brightness. The launch of the satellite, currently on trial, will take place at the end of 2013, on a Soyuz-Fregat rocket. During this period of time, it is expected to discover hundreds of thousands of new celestial objects. Gaia instruments are so precise that, if it was on the Earth, it would be able to measure the thumb of a person who is on the Moon’s surface.

Gaia will provide information about different parameters (position, speed, distance, physical properties, etc.) for each object, so a map of our Galaxy will be obtained.

Gaia mission will generate more than one petabyte of information, in other words, one million giga, which will have to be processed and analysed in order to get results.

About 400 scientists collaborate in the project in which thirty researchers and technicians from the Department of Astronomy and Meteorology of the UB and from the ICCUB had an important role in creating and designing the instrument, as well as in processing and simulating the data obtained during the mission.'

http://www.nanowerk.com/news2/space/...#ixzz2KkAv2LDt
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Old February 15th, 2013, 04:44 AM   #1248
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When observing them, they seem quite similar, but there are clear differences between brown dwarfs and ultra-cool dwarfs: brown dwarfs do not reach the temperature they need to produce the nuclear reactions which characterize ultra-cool dwarfs. It could be said that brown dwarfs are failed stars because they lack mass.
...they lack mass? What? Let me at it! A star with no mass! I'm there! Interstellar travel here we come! I imagine they meant to say "they lack (the necessary) mass".
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Old February 15th, 2013, 08:47 AM   #1249
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More than 100 people are wounded in russia by meteorites this morning!

http://www.bbc.co.uk/news/world-europe-21468116

Not much news know yet.

Edit: First video images of the massive sonic boom that follows after a few minutes breaking windows and setting of car alarms.




Windows breaking:

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Last edited by Atmosphere; February 15th, 2013 at 09:03 AM.
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Old February 15th, 2013, 10:16 AM   #1250
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.. Wow!!
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Old February 15th, 2013, 10:22 AM   #1251
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LOL they must have shat themselves.
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Old February 15th, 2013, 01:24 PM   #1252
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Those asteroids must be pieces of the bigger 2012 DA14 that will pass Earth today extremely close. .. It is scary ... but there may be more...! Let's hope not.
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Old February 15th, 2013, 01:33 PM   #1253
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No, A well know Dutch professor just spoke about this incident and said it has nothing to do with the astroid that passes tonight. That one will even come from a totally different direction.
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Last edited by Atmosphere; February 15th, 2013 at 02:09 PM.
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Old February 15th, 2013, 02:02 PM   #1254
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Then that's a amazing coincidence. What are the odds of that happening? Another asteroid hitting at the exact date another is passing ? Wow.
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Old February 15th, 2013, 02:36 PM   #1255
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Asteroids pass us by pretty much every day, only few are detected though. So it's more a coincidence we detected this specific one.
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Old February 15th, 2013, 07:09 PM   #1256
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Old February 16th, 2013, 04:25 AM   #1257
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Nice videos for space exploration. Now Russia is ahead of everyone as they wont have to go into space to capture asteroids like DSI or PR...
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Old February 16th, 2013, 11:05 PM   #1258
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Then that's a amazing coincidence. What are the odds of that happening? Another asteroid hitting at the exact date another is passing ? Wow.
I heard today that about 100t of cosmic stones are falling down on Earth everyday - or burn in the atmosphere, but we don't noticed that cause it's happen mostly above the oceans.
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Old February 17th, 2013, 10:40 PM   #1259
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I heard today that about 100t of cosmic stones are falling down on Earth everyday - or burn in the atmosphere, but we don't noticed that cause it's happen mostly above the oceans.
or maybe because its 100 tons spread over 1 million small boulders each weighing less than 100g
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Old February 18th, 2013, 02:12 AM   #1260
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I heard today that about 100t of cosmic stones are falling down on Earth everyday - or burn in the atmosphere, but we don't noticed that cause it's happen mostly above the oceans.
yep but this guy it was 10000t it means 1/3 of year average and in addition in a single piece.
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