Look Into Columba Constellation

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Basic Telescope Designs

The job of a telescope is to collect light, not to magnify an image (the eyepiece does that job). The larger the objective (the part that collects the light) whether it be a lens, in refractors, or a mirror, in reflectors, the more light the telescope will collect. The more light you can collect, the more detail you will be able to capture, and also important for astrophotography, the shorter your exposures will need to be to capture this detail.

Refractor Telescopes

The type of telescope most people visualize when they hear the word telescope is the 'Refractor'. This is what Galileo used for his break-thru discoveries. A refractor has an objective lens at the front which passes the light straight through to the back of the tube, focusing this light at an eyepiece or for astrophotography a camera.

Advantages:

-No central obstruction (see more in the reflecting scopes), giving higher contrast.

-Due to the simple design they require little maintenance.

-Excellent for planetary and lunar viewing and photography.

-Excellent for wide field viewing and astrophotography especially in shorter focal lengths (more on this later).

-Because the objective is permanently mounted and aligned there is no need for collimation (again more on this in another article).

-Excellent color in apochromatic and ED (Extra Dispersion) designs.

Disadvantages:

-Costlier per inch of aperture (objective) than reflectors and catadioptric telescopes.

-Can become bulky and difficult to manage, especially in larger lens designs.

Newtonian Telescopes

This design was invented by Sir Isaac Newton (he of the apple on the head fame). Instead of a lens at the front of the tube this telescope design uses a concave, parabolic mirror to collect light reflecting it back towards the front of the tube to a flat diagonal mirror which reflects the light out the side of the telescope to the eyepiece or camera for astrophotography.

Advantages:

-Lowest cost per inch of all the telescope designs.

-More light gathering power per dollar because of the lower cost design.

-Absolutely perfect color rendition.

-More compact design compared to a refractor of similar light gathering ability.

-Excellent contrast for planetary and lunar astrophotography and viewing in longer focal lengths.

-Can get excellent wide-field astrophotos and short exposures in shorter focal lengths.

Disadvantages:

-Slight loss of contrast due to the central obstruction (the flat secondary mirror) as compared to a refractor.

-Requires more maintenance, such as collimation (discussed in another article) which is vital for great results in your astrophotography, although you will learn how to do this quickly with practice.

Schmidt-Cassegrain Telescopes

This is a very popular design, with a high tech look. Also known as a CAT (Catadrioptics). They use a combination of lenses and mirrors to collect and focus the light onto the eyepiece or camera. The light enters the telescope through a thin 'lens' called a schmidt corrector plate, goes to the back of the scope to a spherical primary mirror which reflects the light back towards the front. Here the light strikes another mirror, the secondary mirror which is mounted on the corrector plate. This secondary mirror then reflects the light back towards the back where it is focused onto a hole in the primary mirror where the light is collected by an eyepiece or your astrophotography camera.

Advantages:

-Compact and portable.

-Low maintenance although once again collimation is required for top performance.

-Many, many astrophotography accessories available.

-Cheaper per inch of aperture as compared with refractors.

-Excellent all-round telescope, good to very good for both visual and astrophography.

-Very good for planetary and lunar viewing and astrophotography.

-Very good to excellent for DSO (Deep Space Object) astrophotography with a caveat (see the disadvantages).

-Very good to excellent optics, both Meade and Celestron are putting out excellent optics on a consistant basis.

Disadvantages:

-Costlier per inch of aperture as compared with Newtonian telescopes.

-Loss of contrast due to the central obstruction which is even larger than that in the Newtonian scopes.

-Due to their longer focal lengths the field of view is smaller and longer exposures are required for astrophotography, although a lens known as a focal reducer is available which minimizes or removes this problem. The longer focal length is actually an advantage in planetary and lunar photography.

Maksutov-Cassegrain

The Maksutov-Cassegrain telescope design is basically the same as the Schmidt-Cassegrain design except it uses a meniscus lens at the front instead of a Schmidt corrector plate. The main advantage to the Mak telescope design is you will get sharper higher contrast planetary and lunar images when compared with the Schmidt design.

1. Beverage News

... in the transaction said. 2.9 Topics: Constellation Brands, Mississauga, ON, Canada, Ontario ... ... Sunday services in the North Bay, at Saint Columba's Episcopal Church. 2.9 Topics: Wine, Organic ...
http://205.217.154.74/business/beverages

2.

Columba ''A separate article is titled Columba (constellation). ''See Columba (genus) for the genus of doves and pigeons. Saint Columba (7 December 521 - 9 June 597) (also known as Saint Columcille ...
http://www.yotor.com/wiki/en/co/Columba.htm

3. Moon Phase Prediction Software & eBook.

Learn about the Moon with this eBook and predict Moon phases and more with the associated astronomy/astrology software package.
http://thx1142.nsocat.hop.clickbank.net" target="_top

4. Hexapedia - Columba (constellation)

About Contact Home Web Site Directory | Encyclopedia Encyclopedia Columba (constellation) Columba (Image disabled) Abbreviation Col Genitive Columbae Meaning in English Dove Right ascension 6 h ...
http://www.hexafind.com/e ...lumba_(constellation)

5. Columba

... See Columba (constellation) for details. Columba is the genus for doves and pigeons . Related Products Hildegard of Bingen: Scivias (Classics of Western Spirituality (Paper)) Hildegard von Bingen ...
http://www.freeglossary.com/Saint_Columba

6. Astronomical Constellations

... Night Sky Mythology, Legend & Facts Choose a Constellation Andromeda Antlia Apus Aquarius Aquila Ara ... ... Centaurus Cepheus Cetus Chamaeleon Circinus Columba Coma Berenices Corona Australis Corona ...
http://www.r-clarke.org.u ...s/constellations1.htm

7.

... I've drawn the asterism as well. The constellation's Bayer stars are not complete, and mostly are in the fourth and fifth magnitude range. Double stars: Columba has no binaries of interest. Phaet ...
http://www.dibonsmith.com/col_con.htm

8. Pomba brownsville - jiii.dnsalias.net/bordel/Vincent_mirc/channels.txt

... codes.pdf msgid "" msgstr "" "Project-Id-Version: kstars\n" "POT-Creation Constellation name (optional)\n" "COLUMBA" msgstr "POMBA" #: kstars_i18n.cpp:26 msgid probably does not need a translation)\n ...
http://pomba.getinfoeasy.com/?q=pomba-brownsville

9. --> STARS THAT MAKE UP THE ANDROMEDA CONSTELLATION ::

... xdrx.lubin.pl/ The Constellation - cetus with Columba the constellation and stars ... ... Constellations hercules pegasus constellation southern cross constellation stars that make up the andromeda ...
http://www.rio-raum.de/st ...aconstellation-54642/

10. The The constellation of gemini with constellation lesson plans and constell...

http://the-constellation-of-gemini.xdrx.lubin.pl/

11. STSliftoff.com Home Page

... The blue Shuttle rising above Earth s horizon includes the Columba constellation of seven stars, echoing the STS-107 patch and commemorating the seven members of that mission. The crew of STS-114 ...
http://stsliftoff.com/rtf.htm

13. MSN Encarta - Encyclopedia Article Center - Astronomy & Space Science

... astronomy) * Chiron (astronomy) * Color Index * Columba * Coma Berenices * Comet Comet, Shoemaker-Levy * Compton Gamma Ray Observatory * Constellation (astronomy) Coordinate System (astronomy ...
http://encarta.msn.com/ar ...my_Space_Science.html

14. Full text of C by Webster's Dictionary (1913 Edition)

... Collin to Colonize Colonizer to Colugo Columba to Combinable Combinate to Come Co-meddle to ... ... to Consonantly Consonantness to Constellate Constellation to Constringe Constringent to Consummate ...
http://www.bibliomania.com/2/3/257/1194

16. ipedia.com: List of astronomical topics Article

... Per -- Collinder catalogue -- Color -- Color (disambiguation) -- Color temperature -- Columba (constellation) -- Coma (cometary) -- Coma aberration -- Coma Berenices -- Comet -- Comet Encke ...
http://www.ipedia.com/lis ...ronomical_topics.html

17. STS-114 Mission Patch

http://spaceflightnow.com ...tches/sts114rtf_s.htm

18. Lakota Star knowldge 4.5: Winter Solstice Stars

... Circle 7 Tayamni Animal (Buffalo?) Large constellation inside racetrack, composed of Betelgeuse ... ... 7 minor stars in canis major, all stars in columba; this southern snake appears in winter 12 ...
http://www.kstrom.com/isk/stars/starwint.html

19. Constellations: The Columba Constellation

Constellations: The Columba Constellation Find Your Inner Astronomer... ASTRONOMY GUIDE: Planets & ... ... Related Links Sitemap < back to Constellations The Columba constellation The constellation of ...
http://www.go-astronomy.c ...ions.php?Name=Columba

20. SkyEye - 88 Constellations

... as the IAU has tried to maintain ancient constellation boundaries as much as possible. What ... ... Circinus Lacerta Piscis Austrinus Antlia Columba Leo* Puppis Apus Coma Berenices Leo Minor ...
http://www.obliquity.com/skyeye/88const/

21. Meade LX200 Star Chart - by Constellation

Meade LX200 Star Chart - by Constellation RA Dec Mag Star Name Star# Andromeda Alpha And 00 08 20 +29 ... ... 80 Beta CMi 07 27 08 +08 17 00 2.9 Gomeisa 76 Columba Alpha Col A 05 39 36 -34 04 00 2.6 Phaet 52 ...
http://nfsi-server.yerkes ...tarChart_Constel.html

22. Astronomy Today - Astronomy - Constellations

... Constellations Welcome to Astronomy Today's constellation pages. To view the profiles just scroll ... ... Major, Canis Minor, Cassiopeia, Cepheus, Cetus, Columba, Cygnus, Draco, Eridanus, Fornax, Gemini ...
http://www.astronomytoday ...y/constellations.html

23. The Constellations

... page contains a brief description of the constellation, as well as an historical-mythological ... ... Cygnus Capricornus Circinus Draco Cetus Columba Hercules Coma Berenices Corona Australis ...
http://www.astrofilitrent .../mat/costell_eng.html

24. Constellation names and abbreviations

... Greek Letters Constellations Glossary Constellation Abbreviations Abbreviation Name AND ... ... CET Cetus CHA Chamaeleon CIR Circinus COL Columba COM Coma Berenices CRA Corona Australis CRB ...
http://www.1point1c.org/astro/constellation.jsp

25. StarNevada.com : Death Valley (Mesquite Springs), California: 2003 - Page One

... had enough of the heat, I flew away way with Columba to an area nice and peaceful very near to the ... ... no core. Going farther into the Southern Constellation I have ever gone, I found a nice Globular ...
http://www.angelfire.com/ ...ronomy-dv2-03-01.html

26. Z. Malkin's Acronym Collection

... Colorado Col Columba (constellation) CoM Center-of-Mass Com Coma Berenices (constellation) COM Component Object Model COMET Centre for the Observation and Modelling of Earthquakes and Tectonics, UK ...
http://www.ipa.nw.ru/PAGE ...ND/GEO/zm/zm_acre.htm

27. STARS Program - Discover the Mission

... The constellation Columba (the dove) was chosen to symbolize peace on Earth and the Space Shuttle Columbia. The seven stars also represent the crew members and honor the original astronauts who paved ...
http://www.starsacademy.com/mission/mission.htm

28. Constellation Star, Constellation, Star

... Caelum, Canis Major, Canis Minor, Carina, Columba, Eridanus, Fornax, Gemini, Horologium, Lepus ... ... DON'T WAIT, GET ACCESS TO OUR ASTROLOGY CONSTELLATION CENTER NOW! Live online constellation and ...
http://www.constellationstar.com/

30. Columba the dove

Columba the dove Mythology This group of stars was originally part of Canis Major but in 1679, Royer created the constellation of Columba the Dove. It was supposed to represent the dove released by ...
http://www.starryskies.co ...llations/columba.html