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The My Delta Pi webstore
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Back to main menu - all types of RC models and other hobby items |
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Telescopes and astronomy equipment
Welcome to this online presentation of telescopes and astronomy equipment. Pleace click on a banners to learn more or to buy. The telescopes shown on this page are only selected examples. If you click at any of the product links, you get to a store with many more telescopes to choose from.
Good stores where you can buy telescopes
About the Kepler mission and the search for earth-like planets
Other hobby items - RC helicopters, aircrafts and vehicles, science hobby
Good stores where you can buy telescopes
Here are entrances too some good online store where you can buy teleskopes and astronomy equipmenty
Imaginova - Through this link you get into Imaginova¨s collection of astronomy equipment from Orion. From there you can also browese the whole store.
B & H Photo Video Global - This shop has all types of equipment for observations, including telescopes, binoculars, microscopes and cameras.
Product examples
refractor telescopes
Product examples - reflector telescopes
Product examples - telescope mounts and accessories
About the Kepler Mission and the search for extraterrestrials earth-like planets
The Kepler Space Telescope is a NASA owned and operated telescope and photo-meter with the purpose of looking for planets similar to our own soil, with particular focus on those who are in the acceptable zone of the parent star to host earth-like environment and life. The whole program to launch and operate the teleskope is often called The Kepler Mission. The telescope is named after the German astronomer Johannes Kepler.
Techical data of teh Kepler Teleskope
The Kepler instrument has a diameter of 0.95 meters. The light detectors of the instrument has an overall resolution of approximately 95 megapixels. They can observe light in the wavelength range 400 - 865 nm.
The launch of the Kepler Teleskope
Kepler Space Telescope was launched into space from the Cape Canaveral base in Florida on the 6th of March 2009. It was a Delta II rocket that brought the telescope out in space, and after 62 minutes of running the telescope was released from the rocket, 721 kilometers from earth.
The plan for the Kepler Mission
The price for this quest is about 4.2 billion dollars. Kepler is part of the Discovery program at NASA.
Kepler is a part of the NASA's Discovery Program, a program consisting of targeted low-cost projects.
The responsibility of the over-all mission operation, the scientific observations, the data analysis and the ground state system development lies within NASA's Ames Research Center.
NASA's Jet Propulsion Laboratory is the effectors of The Kepler Missjon development. Ball Aerospace & Technologies Corp. has developed and maintains the Kepler flight system.
The plan for the Kepler Mission
The Kepler mission has the aim of detecting planets orbiting other stars in our galaxy, It has the aim of detecting individual planets and measure the properties of each planet and their orbits. It also has the aim of measuring and analyzing over-all caracteristics of planet systems, like the density of planets. It will further find out what kind of stars that are likely to have planet systems.
The mission will especially look for planets of around the same size as the earth, that orbit in a comparable distance to the star and that orbit around stars of much the same type and size as our sun. By finding such planets one have good candidates for planets housing environments, life and echology of the same types as the Earth.
The telescope will observe a range of more than 100 000 stars continuously throughout the lifetime of travel, 3.5 years or more
How planets will be detected by the Kepler Teleskope
Planets are detected when they pass in front of the parent star, and thus reduce the brightness of the star.
The Kepler Mission is designed to observe 100,000 stars simultaneously and measure variations in their brightness every 30 minutes. An observation of a planet is regarded as positive when it has occured at least 3 times.
What have Kepler detected
In the first period of operation in 2009 the teleskope has mostly been used to confirm planets allready detected by previous operations, like observations from the Hubble telescope. Kepler has successfully confirmed these observations and thus proved both its own functionality and further secured those previous observations.
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Create your own clothes
with Spreadshirt Designer - Here you can decide patterns, colors, figures and texts for your own clothes by an online interface, and order the clothes you have designed. The shop will send the clothes in 24-48 hours. You can design T-shirts, men's and ladies's longsleeves, jackets, special ladie's wear, trigema, football shirts, shorts, socks, junior's clothes, headwear, underwear and several types of apparel accessories. Design clothes for yourself or as a gift for your friends.For residents in US, please click at this banner:
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To find microscopes for hobby and professional use,
please click here.
To find binoculars, night vision devices and cameras and binocular cameras for
hobby, spare time and professional use,
please click here.
Some explanations about telescopes
Achromatic: Lenses refract different colours differently, making a certain separation of the colors of an image and a somewhat blurred image. In an achromatic optical device two or more lenses are combined so that the aberration caused by one lense is cancelled by the other.
Aperture: This is the diameter of the objective lens. The graeter the aperture, the more light is gathered, and the weaker objects can be seen. However, a greater aperture does not give any greater maqnification.
Asimuth mount: By this mounting method, the telskope can be rotated both in the horisontal plane and the vertical plane.
Chromatic aberration: This is halos of colours or colored fringes around objects seen in a telescope. This is caused by the lenses refracting light of different colors slightly differerently. It is mostly cancelled by achromatic lens combinations.
Convexe: Somethings that is thickest at the mid part and get thinner towards the periferiy. A convexe lense gathers the light at a point. A convexe lense is magnifying an image. A convexe mirror on the other hand is decreasing the size of the picture. This is because a convexe mirror spreads light.
Concave: Something that is thickest or highest at the perifery and gets thinner or slopes inwards towards the mid. A concave lense spreads the light. A concave mirror projects the light at a point. A concave lense is minimizing a picture, while a concave mirror is making the image greater.
Equatorial mount: By this method of mounting a telescope, one axis is parallel to the Earth''s axis, - the polar axis. The other one is held at right angles to the polar axis, and is therefore parallel to the plane of the Earth's equator, the declination axix. By this mounting system, a celestial object can be held in focus only by rotating the telescope around the polar axis.
Finder: This is a small telescope with a wide angle of view mounted to the main telescope. It is used to help finding the object to look at and pointing the main telescope in the right direction.
Objective: The first unit in a telescope that the image passes through.
Ocular: The unit in a telescope nearest to the eye of the observer.
Refractor telescope: A telescope that uses convexe lenses that the light goes through to magnify the image
Reflector telescopes: A reflector telescopes uses concave mirrors that reflect the image to enlarge it. Usually the objective is a mirror, and there is a mirror to reflect the image into the ocular. The ocular is usually made up of lenses.