DISCLAIMER: The larger the aperture, the more light a telescope will gather and the fainter the object you can see. Here is a range of magnitudes you might expect to see. Given excellent sky conditions and good optics, a well trained eye can sometimes add up to 0.8 magnitude to these values. Limiting Magnitude depends on much more than the instruments aperture. ... One formula is for aperture in inches the other is for aperture in millimeters. ... Aperture (inches) . ... 15.2 . ...

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• Observatory Links
• Astronomical Glossary - S - Z
• Benefits of Membership

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• Astronomical Circular - Contents
• Student's Astronomical Observatory

... Bad Astronomy . ... Radio . ... Bitesize Astronomy . ... Think of a telescope as a bucket that collects light. ... So over the years, telescope makers have focused on making telescopes bigger and bigger. ... For radio telescopes, however, the size limit is much bigger. Many astronomical objects emit radio waves, and as it happens telescopes built to detect radio don't have the same stringent smoothness criteria optical telescopes do. ... But radio telescopes can get even bigger. ...

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• Phil Plait's Bad Astronomy: Mad Science
• Phil Plait's Bad Astronomy: Info
• Phil Plait's Bad Astronomy: Misconceptions: Coast to Coast Am

To see a Russian version of this page, click here . ... Graduated from Moscow State University (MSU), Faculty of Physics in 1976. Ph.D. degree - 1988, MSU. Main field of scientific activities: photometric investigations of various stars, close binary stellar systems and other astronomical objects, including research with use of fast photoelectric photometry with a high time resolution till 1 millisecond. ... New portable photometer . ... Send your mail to: tem@sai.msu.ru ...

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• Tatjana Khruzina

... The project assumes creation of an international space observatory - the interferometer "Earth - Space - Space" in order to perform of astronomical investigations in millimeter, submillimeter and infrared regions with extremely high sensitivity (to a few nanoJanskies units of flux density in continuum spectrum) and extremely high angular resolution (to a parts of microsecond of arc or, possibly, nanosecond). ... radio-interferometric channels of the system "Space - Space", region 0.2 - 3 mm; . ...

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• Project SUBMILLIMETRON
• RadioAstron main page, english version

... Solar Space Experiments in LPI . ... The main goal of the TESIS is to provide complex observations of solar active phenomena from the transition region to the inner and outer solar corona with high spatial, spectral and temporal resolution in the EUV and Soft X-ray spectral bands. ... Solar EUV Coronagraph (SEC), based on the Ritchey-Chretien scheme, to observe the inner and outer solar corona from 0.2 to 4 solar radii in spectral band 290-320 A . ... 2 arc. sec./pix . ... Backside-CCD 2048*2048 pix...

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• TESIS - Telescopes for EUV Spectral Imaging of the Sun
• Astronomy news
• A malfunction in one of the TESIS telescopes has been fixed

Wide-angle telescopes for photometry and polarimetry in optical and infrared ranges . ... Investigation of the Earth?s atmosphere, comets, interplanetary and interstellar medium with brightness and linear polarization measurements of extended sources and sky background in optical and infrared spectral ranges. ... The devices are small diameter telescopes with CCD-detectors for optical and infrared spectral range with spectral and polarization filters. ... 15-cm telescope with cooling down to 80 K . ...

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• Spacecraft Observing the Sun and the Heavens above

Here is an image a supernova in NGC 3075. The image taken at 23.3.1998 22.03 UT, CCD ST-7, 1680 s. Track and Accumulate exposure (42x40), no filter, dark and flat corrected, temp -20c, telescope used was 152/2063 refractor. Image were taken at the center of our city, Jyvaskyla. ... Image was cropped a bit from corners because I couldЄn get a good flat. ... Observer Marko Moilanen , Jyvaskyla, Finland. Back to Supernovae in NGC and IC galaxies. ...

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• Supernova 1998S in NGC 3877
• Activity Feed
• Bright Supernova pages - Statistics

... MASTER Net is 56 square degrees per 1 exposition . ... 06 Dec 2015: GRB 151205B: MASTER-NET early optical observations GCN18665 . ... 18 Nov 2015: GRB 151118A: MASTER-NET optical observations GCN18613 . ... 12 Nov 2015: GRB 151112A: MASTER-NET optical limit GCN18591 . ... 07 Nov 2015: GRB 151107A: MASTER-NET optical observations GCN18565 . ... 31 Oct 2015: Five OTs detected by Global Robotic MASTER Net ATel8232 . ... 02 Oct 2015: GRB 151001B: MASTER-NET early optical observations GCN18380 . ...

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51. M31.SPB.RU: Archive - Books - ZRT 457 MP 20x60

52. Izmccd

53. Radioastrophysical Observatory ISTP RAS SB

54. SAI Space Monitoring Laboratory

55. Speckle polarimeter

56. S.P. Korolev RSC Energia - International Space Station

57. AAL Homepage

58. Methods and instruments to measure/monitor major site properties

59. arxiv:0709.2048 Cherenkov Telescope Array - Научная панорама

60. The Instruments