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Laboratory of X-ray Astronomy of the Sun





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Day July 20, 2009 - The TESIS Observatory will observe two solar eclipses from space
Early in the morning on 22 July, 2009, at around 01.00 GMT (05.00 Moscow time) the trajectories of the Sun and Moon will converge at a particular point in the celestial sphere, and on Earth the Moons shadow will fall on India. This will mark the beginning of one of the most beautiful phenomena in the natural world and astronomy a full solar eclipse, which, this year, will move from Asia across India, China, Japan, the Marshall and Gilbert Islands, and will finish its journey on the Pacific Ocean at around nine in the morning Moscow time (05.00 GMT). This years eclipse is unique in duration. At its climax, the Earth will be plunged into darkness for 6 minutes and 39 seconds. However, this long period of darkness will only be observed by sailors out at sea and a few lucky yacht owners the point of maximum eclipse (northern latitude 2112.6', eastern longitude 14406.4') will be on the Pacific Ocean close to the edge of the Philippine Sea. Indias inhabitants will be able to feast their eyes on the fiery-edged black disk of the Sun for around three and a half minutes, and China, across which the Moons shadow passes, will be plunged into darkness for 4.5 to 6 minutes.

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The TESIS Observatory will observe two solar eclipses from space
 
Day July 6, 2009 - TESIS has photographed this years most powerful solar flare
This years most powerful solar flare was photographed by TESIS telescopes in the southern hemisphere of the Sun on July 5th, 2009. The flash lasted 11 minutes from 10:07 until 10:18 Moscow time, reaching its peak at 10:13 Moscow time. At its highest point, the intensity of solar X-rays reached level 2.7 on the 5-point GOES scale.

Fortunately, a further increase in the Suns activity coincided with the beginning of the shadowless orbits of the CORONAS-PHOTON satellite, onboard which the observatory works. The space vehicles orbit plane will be turned to the Sun at an angle of approximately 90 degrees within the next two weeks. As a result, the vehicle will not enter the Earths shadow while it is rotating in orbit and will be able to observe the Sun uninterruptedly. This means that almost all of the solar events of these days will be captured by the TESIS telescopes. Three foreign space vehicles (the Japanese HINODE satellite and two NASA STEREO vehicles) will switch over to high observation frequency mode together at the beginning of the TESIS shadowless orbits.

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This years most powerful solar flare was photographed by TESIS telescopes
 
Day June 16, 2009 - TESIS has recorded new sizeable mass ejections from the Suns atmosphere
One of this years largest mass ejections from the Suns atmosphere was recorded last Sunday by TESIS telescopes aboard the CORONAS-PHOTON satellite (video - wmv 4.3 MB). The source of the ejection was the active area currently located on the far side of the Sun, which is, as yet, invisible from Earth. In total, approximately 103-106 million tons of ionized gas was released into interplanetary space.

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TESIS has recorded new sizeable mass ejections from the Suns atmosphere
 
 
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