* Astronomy

Mount Hood is a huge draw for skiers, climbers and hikers. Volcano researchers, not so much. As volcanoes go, the mountain is monotonous. In Mount Hood's half-million-year history, it hasn't had the explosive, top-blowing eruptions of Mount St. Helens and others among its Northwest sisters. The...

The Three Gorges Dam that spans the Yangtze River at Sandouping, Yichang, Hubei province, China, has been completed. Construction of the largest hydroelectric dam in the world began in 1993. Structural construction was finished on May 20, 2006, nine months ahead of schedule. Eventually, wh...

Title: Unveiling obscured accretion in the Chandra Deep Field South Authors: F. Fiore, A. Grazian, P. Santini, S. Puccetti, M. Brusa, C. Feruglio, A. Fontana, E. Giallongo, A. Comastri, C. Gruppioni, F. Pozzi, G. Zamorani, C. Vignali A large population of heavily obscured, Compton Thick AGNs is p...

Title: Very Low-Density Planets around Kepler-51 Revealed with Transit Timing Variations and an Anomaly Similar to a Planet-Planet Eclipse Event Author: Kento Masuda We present an analysis of the transit timing variations (TTVs) in the multi-transiting planetary system around Kepler-51 (KO...

Title: N-body simulations of planetary accretion around M dwarf stars Authors: Masahiro Ogihara, Shigeru Ida We have investigated planetary accretion from planetesimals in terrestrial planet regions inside the ice line around M dwarf stars through N-body simulations including tidal intera...

The latest revision of fundamental quantities bodes well for the proposed overhaul of the international system of units. Every four years, a task force of the Committee on Data for Science and Technology (CODATA), headquartered in Paris, releases a short-hand description of the physical world:...

San Marco is the name of five Italian satellites put into orbit from 1964 to 1988 as part of the San Marco Project, designed by Professor Luigi Broglio and officially established in 1962 with the signing of a space cooperation agreement between Italy and USA. All five satellites were launched by Scou...

Grigori Grigoyevich Nelyubov (March 31, 1934 - February 18, 1966) was a Soviet cosmonaut who was likely to have been the third or fourth person in space before his dismissal from the Soviet space program. Read more

Kosmos 1220 launched on the 4 November 1980

Kosmos 1220 launched on the 4 November 1980

Pitch Black (also known as The Chronicles of Riddick: Pitch Black) is a 2000 science fiction thriller film directed by David Twohy and starring Vin Diesel. The film costars Radha Mitchell, Cole Hauser and Keith David. Read more [spoiler]...

Isotopes are variants of a particular chemical element such that, while all isotopes of a given element have the same number of protons in each atom, they differ in neutron number. Read more The term "isotope" was suggested to Frederick Soddy in 1913 by Margaret Todd, a Scottish physicia...

On the evening of 18 February 1948, an unusual light illuminated the skies over Norcatur, Kansas. An accompanying shockwave broke windows, and area residents initially thought an airplane had exploded in flight. Sign did not formally investigate, but consulted with scientist Lincon La Paz. The...

The Neagari (L6) meteorite fell in Chubu, Japan, on the 18th February, 1995. A total mass of 420 g was recovered. 36° 26' 57"N, 136° 27' 55"E

The Takenouchi (H5) meteorite fell in Kinki, Japan, on the 18th February, 1880. A total mass of 720 g was recovered. 35° 23'N, 134° 54'E

The Tounkin (Stone) meteorite fell in Respublika Buryatiya, Russia, on the 18th February, 1824. A total mass of 2 kg was recovered. 51° 44'N, 102° 32'E