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  2. Meade ETX telescope - Wikipedia

    en.wikipedia.org/wiki/Meade_ETX_telescope

    The ETX started out as a 90 mm (3-1/2") Maksutov Cassegrain telescope (first produced in 1996) and took advantage of high volume mass production and simplified optical and parts construction to open a new market for a cheap alternative to the very expensive Questar 3-1/2 Maksutov Cassegrain [1] [2] The ETX "line" has been expanded to 105 mm, and 125 mm Maksutov Cassegrains and achromatic ...

  3. Solar eclipse of January 26, 1990 - Wikipedia

    en.wikipedia.org/wiki/Solar_eclipse_of_January...

    An annular solar eclipse occurred at the Moon's ascending node of orbit on Friday, January 26, 1990, [1] with a magnitude of 0.967. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth.

  4. List of solar eclipses in the 21st century - Wikipedia

    en.wikipedia.org/wiki/List_of_solar_eclipses_in...

    The longest annular solar eclipse of the 21st century took place on January 15, 2010, with a duration of 11 minutes and 7.8 seconds. The maximum possible duration is 12 minutes and 29 seconds. The eclipse of May 20, 2050, will be the second hybrid eclipse in the span of less than one year, the first one being on November 25, 2049.

  5. ETX - Wikipedia

    en.wikipedia.org/wiki/ETX

    ETX may refer to: ETX (form factor) , Embedded Technology eXtended computer-on-module specification Meade ETX telescope , popular line of compact Maksutov-Cassegrain telescopes made by Meade Instruments Corporation

  6. Solar eclipse of July 22, 1990 - Wikipedia

    en.wikipedia.org/wiki/Solar_eclipse_of_July_22,_1990

    A total solar eclipse occurred at the Moon's descending node of orbit between Saturday, July 21 and Sunday, July 22, 1990, [1] with a magnitude of 1.0391. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth.

  7. List of solar eclipses in the 20th century - Wikipedia

    en.wikipedia.org/wiki/List_of_solar_eclipses_in...

    March 29, 1987: second hybrid eclipse in less than one year, the first being on October 3, 1986. [citation needed] July 11, 1991: solar eclipse with the shortest gamma, of only −0.00412. [citation needed] July 31, 2000: the second solar eclipse within one calendar month, the first being on July 1, 2000.

  8. Saros (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Saros_(astronomy)

    18.999 eclipse years (38 eclipse seasons of 173.31 days) 238.992 anomalistic months; 241.029 sidereal months; The 19 eclipse years means that if there is a solar eclipse (or lunar eclipse), then after one saros a new moon will take place at the same node of the orbit of the Moon, and under these circumstances another solar eclipse can occur.

  9. ETX (form factor) - Wikipedia

    en.wikipedia.org/wiki/ETX_(form_factor)

    ETX module CX700M from Aaeon Kontron ETX-PM16 top view Kontron ETX-PM16 bottom view with connectors. ETX, standing for Embedded Technology eXtended, is an integrated and compact 95 × 125 mm (3.7 × 4.9 in) computer-on-module (COM) form factor, which can be used in a design application much like an integrated circuit component.

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