... Comet SOHO and Nebulae in Orion . ... Recent photographs by the spacecraft Mars Global Surveyor, currently in orbit around Mars, show features unusual for Mars yet similar to a dried pond on Earth. ... Solar Flares Cause Sun Quakes . ... The quake was the first ever recorded on the Sun, but only because astronomers have only recently figured out when and how to find them using the orbiting SOHO spacecraft. ... Yes, but in the above picture, the Earth's atmosphere makes it appear almost square. ...

... December 18, 1997 . Gamma-Ray Burster . ... Explanation: Gamma-ray bursts seem to be the most powerful explosions in the Universe. ... These Apache Point Observatory optical images from Monday and Tuesday this week have helped identify a faint, fading object (red arrow) near the position of a gamma-ray burst . The gamma-ray burst triggered satellite observatories on Sunday, December 14th. ... About APOD > . ...

... 2000 December 15 . IC443's Neutron Star . ... Explanation: Using x-ray data from the orbiting Chandra Observatory along with radio data from the Very Large Array , a team of researchers has discovered evidence for a new example of one of the most bizarre objects known to modern astrophysics -- a neutron star . ... The core collapsed when the star, located a reassuring 5,000 light-years away in the constellation Gemini , exploded long ago. How long ago? ... About APOD | ... NASA Technical Rep.: ...

Regions designation | Regions models | ASCII files description . The real time visibility of the IB_TAIL relative to the Evpatoria and Panska Ves . ... The real time regions passing . ... The IB_TAIL geocentric distance as a function of the Moscow time (MT = UT + 3h) (Plot) . Geomagnetic local time in the IB_TAIL position as a function of the MT (Plot) . The IB_TAIL orbital data ASCII files . Updated 19 October, 1999 . ... INTERBALL mission  ...

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... Astronomy for Kids . ... Imaging Basics . ... Mars orbiter images rover and tracks in Gale Crater . ... NASA's Curiosity Mars rover and its recent tracks from driving in Gale Crater appear in an image taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter on December 11, 2013. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... News . ... S.P. Korolev RSC Energia is the prime manned space flight organization in the Russian rocket and space industry, responsible for the development of the ISS Russian Segment, its integration into the Space Station and its operation, including development and operation of its principal modules (Zvezda, Pirs, Poisk, Rassvet, etc.), manufacturing, launch and operation of Soyuz TMA and Progress M spacecraft. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Although the comet itself never comes dangerously close to the Earth, the particles of dust that it has shed during its many past passages through perihelion found their way into the Earth's atmosphere, appearing as meteors in the cold December sky. ... Animation 1 . ... An Ursid meteor captured by the Armagh Observatory's NE-facing meteor camera in the early morning of 23rd December. ... Meteor Showers Online . ...

Last modified: 23 September 1997 . ... Modified: 23 September . ... Changed observing time to 08:00-14:00 (AT, HO, MP, SH, HH) V125a Nov 01 Cancel 3C380 (VLBA, GO) VS07u Nov 03 Changed observing times (KA, HO, HH) V053c3 Nov 05 Changed observing times (VLBA) VS09q Nov 20 Cancel (GB, AR) V019b Nov 25 Changed observing times (AT, HH, MP, UD) V001a Dec 02 Removed AT VS03j Dec 03 Cancel (KA, MP, UD) V029a Dec 10 Changed times (MK, TI, AT, HH, MP) V035a1 Dec 21 Changed stop time (VLBA, GO, RO) . ...

The Wind spacecraft. ... It was designed to observe the solar wind approaching Earth, from a position near the Lagrangian point L1, and it is part of the International Solar-Terrestrial Physics (ISTP) Initiative . ... The original plan called for "Wind" to approach its final station over two years, undergoing two close encounters with the Moon to boost its speed. ... For additional details and updates, see the home page of the "Wind" mission. Exploration" home page (index) Glossary . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Moon . ... Apollo 17?s CSM, named America, seen over the Moon?s cratered surface. ... Image credit: NASA) . ... Harrison Schmit