Engineers place the heart of the James Webb Space Telescope into the Space Environment Simulator, a giant thermal vacuum and cryogenic testing chamber, at NASA's Goddard Space Flight Center in Greenbelt, Maryland.
The rapid onset of unrest at Mount St. Helens on September 23, 2004 initiated an uninterrupted lava-dome-building eruption that continued until 2008. The initial phase produced rapid growth of a lava dome as magma pushed upward. As shown in the video, an initial succession of lava spines, two recumbent and one steeply sloping, grew to nearly 500 m in length before disintegrating into mounds of rubble. The trajectory of lava extrusion was affected by the geometry of the crater, particularly the proximity of the vent to the south crater wall, and by the growing volume of erupted material.
English : The rapid onset of unrest at Mount St. Helens on September 23, 2004 initiated an uninterrupted lava-dome-building eruption that continued until 2008. The initial phase produced rapid growth of a lava dome as magma pushed upward. As shown in the video, an initial succession of lava spines, two recumbent and one steeply sloping, grew to nearly 500 m in length before disintegrating into mounds of rubble. The trajectory of lava extrusion was affected by the geometry of the crater, particularly the proximity of the vent to the south crater wall, and by the growing volume of erupted material.
A high-definition look at the complexity of activity occurring on the surface of the Sun. Coronal loops — linking areas of opposite magnetic polarity in the photosphere — enormous solar prominences and sunspots are all to be seen here.
English : A high-definition look at the complexity of activity occurring on the surface of the Sun. Coronal loops — linking areas of opposite magnetic polarity in the photosphere — enormous solar prominences and sunspots are all to be seen here.
Bassel Khartabil is a Syrian Wikipedian and a passionate advocate for free knowledge. On November 11, 2015 rumors surfaced that Khartabil had been secretly sentenced to death. Bassel Khartabil's wife Noura wrote him this letter on Valentine's day on feb 14, 2015.
English : Bassel Khartabil is a Syrian Wikipedian and a passionate advocate for free knowledge. On November 11, 2015 rumors surfaced that Khartabil had been secretly sentenced to death. Bassel Khartabil's wife Noura wrote him this letter on Valentine's day on feb 14, 2015.
Raja Harischandra (English translation: "King Harishchandra") is a 1913 Indian silent film directed and produced by Indian icon Dadasaheb Phalke, and is the first full-length Indian feature film.
English : Raja Harischandra (English translation: "King Harishchandra") is a 1913 Indian silent film directed and produced by Indian icon Dadasaheb Phalke, and is the first full-length Indian feature film.
