... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

Еще в разделе: (Показать все результаты (>2713) - star.arm.ac.uk/ )

... Listed below are questions submitted by users of "The Great Magnet, the Earth" and the answers given to them. ... In "The Exploration of the Earth's magnetosphere" on the magnetic environment of the Earth in space (a few Q duplicated here) . ... 11) Magnetic Shielding . ... 51) Can electricity be generated from the Earth's magnetic field? ... 9) Measuring Earth's magnetic field . ... 6) Reversals of the Earth's field (4 queries) . ... 42) Could generated electricity affect Earth's magnetic field? ...

Еще в разделе: (Показать все результаты (>1490) - www.cosmos.ru/ )

• FAQ: "Exploration of the Earth's Magnetosphere"
• Kepler's Third Law
• The Exploration of the Earth's Magnetosphere"

... Listed below are questions submitted by users of "The Great Magnet, the Earth" and the answers given to them. ... In "The Exploration of the Earth's magnetosphere" on the magnetic environment of the Earth in space (a few Q duplicated here) . ... 11) Magnetic Shielding . ... 51) Can electricity be generated from the Earth's magnetic field? ... 9) Measuring Earth's magnetic field . ... 6) Reversals of the Earth's field (4 queries) . ... 42) Could generated electricity affect Earth's magnetic field? ...

Еще в разделе: (Показать все результаты (>983) - www.iki.rssi.ru/ )

• Rotating Frames of Reference in Space and on Earth
• The Sun
• The Earth's Magnetosphere

... GRACE Maps the Gravity of Earth . ... 23.07.2003 . ... To help better understand the Earth's surface , slight distance changes between a pair of identically orbiting satellites named GRACE have been used to create the best ever map of Earth's gravitational field . ... Maps like this also help calibrate changes in the Earth's surface including variable ocean currents and the melting of glaciers . ... Publications with keywords: GRACE - Earth . Publications with words: GRACE - Earth . ...

Еще в разделе: (Показать все результаты (>123399) - www.astronet.ru/ )

• Rotating Earth from Galileo
• Астронет > GRACE Maps the Gravity of Earth
• Астронет > Rotating Earth from Galileo

... 2003 July 23 . GRACE Maps the Gravity of Earth . Credit: GeoForschungsZentrum Potsdam , CSR U. Texas , JPL , NASA . ... To help better understand the Earth's surface , slight distance changes between a pair of identically orbiting satellites named GRACE have been used to create the best ever map of Earth's gravitational field . ... Maps like this also help calibrate changes in the Earth's surface including variable ocean currents and the melting of glaciers . ... About APOD | ...

Еще в разделе: (Показать все результаты (>6341) - www.sai.msu.su/ )

• APOD: 2007 May 14 - Rotating Earth from Galileo
• APOD: 2002 January 22 - Neutron Bounce Quantized in Earth Gravity
• APOD: 2001 October 15 - The Earth and Moon Planetary System

... Bad Astronomy . ... Every few months, one of a series of questions comes up on the USENET group sci.astro involving tides, or the rotation of the Moon, or the recession of the Moon from the Earth. ... Why the Moon's rotation period is the same as the length of time it takes to orbit the Earth (same as number 1, but phrased differently). ... But when this happens, the time it takes for the Earth to rotate once will be slowed to exactly the same time it takes for the Moon to go around the Earth once! ...

Еще в разделе: (Показать все результаты (>407) - www.badastronomy.com/ )

• Phil Plait's Bad Astronomy: Bitesize Astronomy
• Phil Plait's Bad Astronomy: Mad Science
• Phil Plait's Bad Astronomy: Bad News

... Our restless globe and its companion. ... A Look at the Motions of the Earth in Space and How They Are Changing . ... Earth's rotation as viewed from above the north and south geographic poles. ... The Earth revolves around the Sun-also counterclockwise viewed from above the North Pole, clockwise viewed from the South Pole-to give us our years (see Figure 2 ). The plane of the Earth's orbit is called the ecliptic (where eclipses happen). ... Earth's orbit as viewed from the north ecliptic pole. ...

Еще в разделе: (Показать все результаты (>1284) - www.astrosociety.org/ )

• ASP: What If the Moon Didn't Exist?
• ASP: Searching for Earth's History Among Earth-like Worlds
• ASP: Contents, Winter 2007

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... A most promising problem is to investigate the interaction of two VHF powerful radiowave beams in the ionosphere, whose difference frequency is equal to the plasma frequency in some ionospheric area (that is, the difference frequency is taken in the range 1-8 MHz). ... Two-frequency interaction effects are based on radiowave non-linear mixing, which is rather complicated when describing and modelling the experiment. ...

Еще в разделе: (Показать все результаты (>41) - rp.iszf.irk.ru/ )

• East Siberian Center for the Earth's Ionosphere Research. Ionospheric parameter
• East Siberian Center for the Earth's Ionosphere Research. Chirp ionosonde
• East Siberian Center for the Earth's Ionosphere Research. SW radiosignal

.

Еще в разделе: (Показать все результаты (>672) - zebu.uoregon.edu/ )

• Potential Energy
• Intelligent Life On Earth?
• Solar Energy

... These trajectories have an initial flight from the Earth to a large distance (of about 1.5 million km), the following passive flight to the Moon's orbit, an approach to the Moon with a decrease of an energy of a particle (spacecraft) selenocentric motion to a negative value and the temporary capture in an elliptic orbit of the Moon's satellite. ... Several trajectories of this type are determined. ... Ivashkin V. V. On optimal trajectories of space flight to the Moon in the Earth--Moon--Sun system. ...

Еще в разделе: (Показать все результаты (>595) - www.ipa.nw.ru/ )

• http://www.ipa.nw.ru/conference/2002/sovet/PS/FOMINOV.PS
• Keywords_60
• Keywords_272

A spherical meteorite of radius 3m enters the Earth's atmosphere at an altitude of 100km and a speed (relative to the Earth) of 30 km/s. The atmosphere slows it down, so when it hits the Earth's surface it is travelling at only 1 km/s. If half of the heat generated as it passes through the atmosphere is absorbed by the meteorite, how hot will it be when it is about to land? ... However, the number I calculated (500,000 K) is correct, as is the discussion that follows it. ...

Еще в разделе: (Показать все результаты (>695) - www.mso.anu.edu.au/ )

• Siding Spring Survey
• Scorched earth
• Orbits

The Earth. ... The middle raiding of the Earth is 6371,032 km, the pole 6356,777 km equatorial - 6378,160 km. The Earth surface area is 510,2 mln km^2, 70,8% of which is the World ocean. ... According to the modern cosmogonical views the Earth was formed 4,6 - 4,7 billions years ago from the protoplanet cloud captured by the Sun. ... The Earth is conditionally divided into 3 parts: a bark a cloak and a core (in the centre). The external layer - the bark is 35 km thick. ... Above the Earth. ...

Еще в разделе: (Показать все результаты (>134) - www.space.vsi.ru/ )

• venerae
• moone
• antichnoste

Image credit: Michael Nolan, Arecibo Observatory. These radar images of near-Earth asteroid 2001 SN263 were obtained on 2008 Feb 12 and 13. ... Image from Feb 12 . ... First near-Earth triple asteroid discovered by Arecibo Observatory . ... was discovered this week by astronomers at the sensitive radar telescope at Cornell University?s Arecibo Observatory in Puerto Rico. ... For example, Arecibo has discovered more than half of the near-Earth binary asteroid systems discovered since 1999. ...

Еще в разделе: (Показать все результаты (>2953) - www.naic.edu/ )

• Asteroid 1998 QE2 and Moon Safely Pass Earth
• Solar Flares Reach Earth National Astronomy and Ionosphere Center (Arecibo
• Arecibo Radar Images of 2007 TU24

... In The Light of Truth" The Grail Message by Abd-ru-shin is a classic work that offers clear and perceptive answers to questions which challenge every human being. ... It answers eternal questions such as what does it mean to be human, what is the purpose of life on Earth, and what happens to "me" when I die. ... In the Light of Truth" The Grail Message is directed solely to the individual human being, irrespective of creed, nationality or race. ...

Еще в разделе: (Показать все результаты (>66112) - www.eso.org/ )

• Earth orientation updates
• Image still from the planetarium show "From Earth to the Universe"
• Aurora around one of the Earth's poles | ESO

... How much brighter is the Sun as viewed from the planet Mercury as compared to Earth ? ... Actually, all of these questions can be answered through a very simple mathematical relationship known as the inverse square law. ... As the distance from the Sun increases the surface area of the sphere grows by the square of the distance. ... Common sense tells us that the Sun will be brighter and the inverse square law tells us how much brighter. ... gr = 0.912 G or 91.2% gravity felt at Earth's surface. ...

Еще в разделе: (Показать все результаты (>9599) - www.arcetri.astro.it/ )

• Frequently Asked Questions
• Earth's Moon - Apollo 12
• Luna and Io - A Comparison Study

A fascinating survey of the diversityяand the surprising similarities to Earthяof our planetary neighbors, this Electronic PictureBook compares and contrasts Earth features with those of other bodies in our solar system, including aspects of atmosphere, surface detail, and subsurface dynamics. ... Click on this icon if you would like to see a collection of snapshots of actual pages from the"Comparing Earth and Its Planetary Neighbors" Electronic PictureBook. ...

Еще в разделе: (Показать все результаты (>14253) - www.stsci.edu/ )

• HRC Earth flats
• The Faint Early Sun: Paradox, Problem, or Distraction?
• Other Worlds From Earth

... Planets . ... Earth Satellites . ... The newly discovered ?mega-Earth? ... Its sibling, the lava world Kepler-10b, is in the background (the two planets? proximity is grossly exaggerated) .?а Kepler-10c has a diameter of about 29 000 km, 2.3 times as large as Earth, and weighs 17 times as much. ... The first mega-earth to be discovered is Kepler-10c which orbits a star lying about 560 light years from the Sun in the constellation Draco. ... Astronomers Find a New Type of Planet: The ?Mega-Earth? ...

Еще в разделе: (Показать все результаты (>2802) - www.armaghplanet.com/ )

• Earth and Moon from Juno spacecraft: image of the month | Astronotes
• Earth | Astronotes - Part 2
• astronomy history | Astronotes - Part 4

otherwise stated, constants are denoted by the following symbols and may be taken to have the values below Elementary charge Speed of light in vacuum Planck constant Permeability of vacuum Permittivity of vacuum Unified atomic mass constant Rest mass of proton Rest mass of electron Boltzmann constant Avogadro constant Gravitational ... A pulse of light of frequency f is emitted from the space station towards the ship at exactly the time the ship passes the Earth in the Earth frame. ...

Еще в разделе: (Показать все результаты (>1585) - www.mrao.cam.ac.uk/ )

• http://www.mrao.cam.ac.uk/~kjbg1/exams/2009_paper.pdf
• http://www.mrao.cam.ac.uk/wp-content/uploads/2014/04/DForgan.pdf

... Научная панорама ? arxiv:0709.0752 Sky in Google Earth . ... arxiv:0709.0752 Sky in Google Earth (Sky in Google Earth: The Next Frontier in Astronomical Data Discovery and Visualization) . ... Описан проект <A HREF=" http://earth.google.com/sky/index.html ">Sky in Google Earth</A>. ... http://xray.sai.msu.ru/~polar/sci_rev/167.html#arxiv/0709.0752 . ... Еще они нам сказали, что image processing для DSS2 какие-то фонари в Гуггле делали 2 года!! ... А черт знает что там они делали два года. ...

Еще в разделе: (Показать все результаты (>890) - www.astronomy.ru/ )

• Полосы полных солнечных затмений для Google Earth - Астрономия и компьютеры

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . This project was established in mid-1998 to help coordinate, and provide a focal point for, the study of those comets and asteroids that can approach the Earth's orbit. ... Web Site . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

Еще в разделе: (Показать все результаты (>1404) - www.astronomy.net/ )

• Question Answered - an Astronomy Net UFO Forum Message
• "Back To The Astronomy Cafe" Book Review - an Astronomy Net Article
• Lowell Observatory Near-Earth Object Search - LONEOS, AstroGuide Listing