1. Maximum Magnification Value - Greatest magnification acceptable for given mirror size.
2. Magnification Value - Determined by dividing the focal length by the eyepiece value.
3. 2x Barlow Value - Multiply the magnification by two.

 Press button to launch calculator.
Where In The World is MIR -  A Real Time View of Space Station MIR, ISS and Shuttle.

Click Here For The Current Location of   "Space Station Mir",   "StarShine Satellite", "The Space Shuttle"  or  "Int. Space Station".   Get NASA's J-Pass Satellite Tracking program featured on CNN.

Astronomy Sounds...

Satellite Sounds -   Hear  Sputnik 1, Sputnik 40 and other satellite audio by clicking below.

Sputnik 40 Launched From MIR 11/97. - .wav(19k)   Sputnik 1 October 4, 1957 Transmission - .au   .wav(110k)   Explorer 1 America's First Orbiting Satellite. - .wav(110k)   Vanguard 1 Launched March 1958. - .wav(115k)   Space Station MIR Downlink Telemetry. - .wav(65k)

Astronomy Audio - Listen to Meteor, Moon and Aurora Audio.   Aurora Audio - Radio distrubance caused by the northern lights. .wav(200k)   Big Bang - Sound remnants from deepest space. This is where time began. .wav(119k)   Comsic Debris - More deep space audio phenomena. .wav(92k)   Earth's Atmosphere - Earthly sounds known as whistlers. .wav(85k)   Moonbounce(EME) - A radio signal bounced off the moon and back to earth .wav(150k)   Perseid Meteor - A perseid meteor strikes the ionsphere. .wav(180k)   Pulsar 0329+54 - This pulsar rotates about 1.4 times a seconds. .wav(65k)   Pulsar 1937+21 - This pulsar rotates 642 times a seconds. .wav(60k)   Vela Pulsar - Hear a rapidly rotating neutron star in the constellation Vela. .wav(107k)