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[4K高清] NASA發(fā)布30分鐘太陽4K視頻 - 前所未有的震撼 完整版 [2160P/MP4/9.82GB]
日前，美國(guó)國(guó)家航空航天局（NASA）公布了一段標(biāo)題為“NASA Thermonuclear Art – The Sun In Ultra-HD”的太陽視頻，這段長(zhǎng)達(dá)30分鐘的視頻達(dá)到了驚人的4K畫質(zhì)，給人們帶來一種前所未有的震撼！
這段視頻畫面由NASA的太陽動(dòng)態(tài)觀測(cè)衛(wèi)星(SDO)拍攝。SDO于2010年2月11日發(fā)射，每天24小時(shí)對(duì)太陽進(jìn)行觀測(cè)。NASA介紹稱，SDO捕捉到的畫面涵蓋了太陽10種不同的波長(zhǎng)，每種都顯示了太陽物質(zhì)的不同溫度。反過來，太陽物質(zhì)的不同溫度能標(biāo)示太陽活動(dòng)，如太陽耀斑、日冕環(huán)等。
太陽活動(dòng)往往會(huì)對(duì)地球產(chǎn)生影響，耀斑和另一種名為日冕物質(zhì)拋射的太陽風(fēng)暴有時(shí)甚至能擾亂人類的太空活動(dòng)。SDO拍攝的這些影像有助于研究者更好地理解保持太陽恒久運(yùn)動(dòng)的電磁系統(tǒng)的復(fù)雜性，讓他們擁有了一個(gè)全新觀察地球跟太陽關(guān)系的角度。
The Sun is always changing and NASA's Solar Dynamics Observatory is always watching. Launched on February 11, 2010, SDO keeps a 24-hour eye on the entire disk of The Sun, with a prime view of hte graceful dance of solar material coursing through The Sun's atmosphere, the corona.
SDO captures images of The Sun in 10 different wavelengths, each of which helps highlight a different temperature of solar material. Different temperatures can, in turn, show specific structures on The Sun such as solar flares, which are gigantic explosions of light and x-rays, or coronal loops, which are stream of solar material travelling up and down looping magnetic field lines.
Scientists study these images to better understand the complex electromagnetic system causing the constant movement on The Sun, which can ultimately have an effect closer to Earth, too. Flares and another type of solar explosion called coronal mass ejections can sometimes disrupt technology in space. Moreover, studying our closest star is one way of learning about other stars in the galaxy. NASA's Goddard Space Flight Center in Greenbelt, Md. built, operates, and manages the SDO spacecraft for NASA's Science Mission Directorate in Washington, D.C.
General
Complete name : NASA - Thermonuclear Art - The Sun in Ultra-High Definition (4K, H.264).mp4
Format : MPEG-4
Format version : Version 4/Version 2
File size : 9.82GiB
Duration : 30mn 24s
Overall bit rate mode: Variable
Overall bit rate : 46.2 Mbps
Encoded date : UTC 2016-02-06 06:28:16
Tagged date : UTC 2016-02-06 06:28:16
Writing application : HandBrake 0.10.2.2015060900
Video
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Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 1 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 30mn 24s
Bit rate : 45.8 Mbps
Width : 3840 pixels
Height : 2160 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 59.940 fps
Minimum frame rate : 59.920 fps
Maximum frame rate : 59.960 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.092
Stream size : 9.74 GiB (99%)
Writing library : x264 core 142 r2479 dd79a61
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Encoded date : UTC 2016-02-06 06:28:16
Tagged date : UTC 2016-02-06 06:28:16
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
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Format : AAC
Format/Info : Advanced Video Codec
Mode extension : LC
Codec ID : 40
Duration : 33mn 24s
Bit rate mode : Variable
Bit rate : 156 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Frame rate : 46.875 fps (1024 spf)
Compression mode : Lossy
Stream size : 33.9 MiB (0%)
Title : Stereo / Stereo
Language : English
Default : Yes
Alternategroup : 1
Encoded date : UTC 2016-02-06 06:28:16
Tagged date : UTC 2016-02-06 06:28:16
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Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
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Duration : 30mn 24s
Bit rate mode : Constant
Bit rate : 224 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Frame rate : 31.250 fps (1536 spf)
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 48.7 MiB (0%)
Title : Stereo / Stereo
Language : English
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Alternategroup : 1
Encoded date : UTC 2016-02-06 06:28:16
Tagged date : UTC 2016-02-06 06:28:16
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