how many satilites are there in the atmosphere?
969966
There are more than 800 active satellites currently in orbit. They represent four percent of the total number of objects currently cataloged by the U.S. space surveillance network; the rest includes abandoned satellites, spent rocket boosters, and other debris.
167067
When I was in school, there was 9.  \n\nMercury\nVenus\nEarth\nMars\nJupiter\nSaturn\nUranus \nNeptune\nPluto\n\nNow, there has been another "planet" found.  I am not sure if they have classified it as a planet in our solar system just yet.
628444
Thousands. There have been about 4000 launches (some with multiple payloads) and my guess is that several hundred of the satellites involved are still active. Nine individual countries have launched satellites (USA, Russia, Japan, China, France, India, Israel, Australia, UK) as well as international consortia (ESA, the European Space Agency, being the most important of those). A large number of countries have enough money and could easily acquire the technology to launch satellites, but choose for economy and convenience to either have another country launch their payloads or to participate in the space projects of other nations.
279099
The average mass of the atmosphere is about 5,000 trillion metric tons. According to the National Center for Atmospheric Research, "The total mean mass of the atmosphere is 5.1480 x 1018 kg with an annual range due to water vapor of 1.2 or 1.5 x 1015 kg depending on whether surface pressure or water vapor data are used; somewhat smaller than the previous estimate.
843663
HOW MANY ARE KNOWN AT THE MOMENT?:\n\n8 in our solar system + 3 dwarf planets\n\n(Planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus & Neptune) (Dwarf Planets: 1 Ceres, 134340 Pluto, 136199 Eris)\n\nAND IN THE MILKY WAY GALAXY?\n\nSince pulsar planets were discovered in 1992 and 51 Pegasi b was discovered in 1995 we now know a total of 209 orbiting other stars:\n\nDetected by radial velocity method: 169 planetary systems, 197 planets, 20 multiple planet systems. \n\nDetected by microlensing: 4 planets. \n\nDetected by direct imaging: 4 planets. \n\nPulsar planets: 2 planetary systems, 4 planets, 1 multiple planet system. \n\nSee the full list in the Encyclopaedia of Exoplanets (third link) published and maintained by the Paris Observatory. Appropriately as it was the work of Urbain LeVerrier at that observatory that led to the discovery of Neptune in 1846.\n\nWHAT OF THE FUTURE?\n\nImproved detection rates can be expected in the coming years. Principally from CoRoT and the Kepler Mission: which being space-based will avoid the problems the earth's atmosphere creates for ground-based telescopes,\n\nCOROT:\n\nOn 15th November 2006 the CoRoT spacecraft arrived at the Baikonour launch base,\n\nCOROT (COnvection ROtation and planetary Transits) is a space mission approved and led by the French Space Agency (CNES) in conjunction with the European Space Agency and other international partners. The primary objective of COROT will be to search for extrasolar planets, particularly those of large terrestrial size. It is scheduled for launch on December 22, 2006, and will be the first mission of its kind.\n\nCOROT consists of a 27 cm in diameter afocal telescope with an array of spectroscopic detectors. The satellite has a launch mass of 630 kg, is 4.10 metres long, 1.984 metres in diameter and powered by two solar panels. \n\nA Russian rocket will lift the satellite into a circular polar orbit with an altitude of 827 km. Over its planned 2½ years mission it will observe perpendicular to its orbital plane meaning there will be no Earth occultations, allowing 150 days of continuous observing. During the northern Summer it will observe in an area around Serpens Cauda and during the Winter it will observe in Monoceros. Between this observing periods for 30 days, COROT will observe 5 other patches of the sky.\n\nThe probe will monitor the brightness of stars, watching for the slight dimming that happens in regular intervals when planets transit their primary. COROT will be sensitive enough to detect rocky planets, though only those several times larger than Earth; it is also expected to discover new gas giants, which comprise almost all of the known extrasolar planets.\n\nCOROT will also undertake asteroseismology. It can detect luminosity variations associated with acoustic pulsations of stars. This phenomenon allows calculation of a star's precise mass, age and chemical composition and will aid in comparisons between the sun and other stars.\n\nIn each field of view there will be one main target star for the asteroseismology as well as up to nine other targets. Simultaneously, it will be recording the brightness of 12,000 stars brighter than apparent magnitude 15.5 for the extrasolar planet study. It is expected that a few dozen planets will be found.\n\nTHE KEPLER MISSION\n\nThe scientific objective of the Kepler Mission, due for launch in 2008, is to explore the structure and diversity of planetary systems. This is achieved by surveying a large sample of stars to achieve several goals:\n\nDetermine how many terrestrial and larger planets there are in or near the habitable zone of a wide variety of spectral types of stars \n\nDetermine the range of sizes and shapes of the orbits of these planets \n\nEstimate how many planets there are in multiple-star systems \n\nDetermine the range of orbit size, brightness, size, mass and density of short-period giant planets \n\nIdentify additional members of each discovered planetar
690955
Go onto the Net and search for NEO's (Near Earth Objects) and you can download all the Data you need. Generally we are hit by a very large body every 200,000 years. Check out Tunguska in Siberia on the Net, where a comet exploded in the upper atmosphere, flattening 100,s of 1000,s of square kilometres of forest in 1908. JULES
715942
the radius of the Earth 6375.654784689 Km. There are many living things on it and it will not be ever counted exactly.
165445
there are 7241.00098723 earths. Period.
310199
1 x Star ("Sol"/"The Sun")\n9 x planets\n140 x satellites (moons) [approx.]\nasteroids [1,000s]\ncomets [by guest appearance only]
607832
Unknown. We don't even know for certain how many there are now. There's at least three, but some scientific research indicates there may be as many as 11.
1084800
There are 47 known moons. You can answer you're own question by going here.\nhttp://sci.esa.int/science-e/www/object/index.cfm%3Ffobjectid%3D35229
361769
Sol (our solar system) consists of 9 planets, over 140 moons (to date) and several small cosmic objects (comets and asteroids).\n\nMercury (0 moons)\nVenus (0 moons)\nEarth (1 moon)\nMars (2 moons)\nJupiter (63 moons as of 2004)\nSaturn (34 moons)\nUranus (21 named moons, 6 unnamed moons)\nNeptune (8 named moons, 5 unnamed moons)\nPluto (1 moon)\n\nThere have been discoveries of more "planetary objects" beyond Pluto, but they have not been declared to be planets in the same sense as the others.
534368
the satelites of the sun are planets \nthe satelites of the earth are moons\nthe satelites of the moon are asteroids
451402
None!\n\nAtmosphere is made up of Nitrogen (78%), Oxygen (21%),Argon (0.9%) and other gasses e.g Carbon dioxide, Methane, Rare (inert) gases (0.1%)
317449
Thousands. It's a little known fact that every satellite in orbit is manned by dozens of human workers, sometimes hundreds.
199622
Scientists estimate that as many as 200,000,000 visible meteors enter the earths atmosphere every day.These and other meteorites are estimated to add more than 1,000 tons daily to the earths weight.Source world book encyclopedia.
71710
The total number of known moons of Jupiter now stands at 63, currently the most of any planet in the solar system. Many additional tiny moons may exist that have not yet been discovered.