Telescopes

The value of a Western Field telescope can vary widely depending on factors such as age, condition, and specific model. Generally, they can range from around $50 for older or basic models to several hundred dollars for more advanced or collectible versions. It's recommended to research current market prices and consider the telescope's condition when determining its specific value.

Saturn is the furthest planet you can see without a telescope. you can also see mercury Venus mars and Jupiter.

Phoenicians cooking on sand discovered glass around 3500 BC, but it took about 5,000 years more for glass to be shaped into a lens for the first telescope. A spectacle maker probably assembled the first telescope. Hans Lippershey (1570-1619) of Holland is often credited with the invention, but he almost certainly was not the first to make one. Lippershey was, however, the first to make the new device widely known.

Mars' appearance from space looks like a bright, reddish ball. The physical structures such as the mountains, volcanoes and valleys will look blurry due to dust storms that cover the atmosphere. On Mars itself, it basically looks like a dark, cold and lifeless desert. The temperatures do not exceed melting point. There are currently no water bodies on Mars although it was said that there is ice underground. It contains the Solar System's largest mountain, Olympus Mons, which measures about 27 km above "sea level", covering a base area as big as Arizona. Although it was rumoured that there were Martians living on that planet, none have been discovered and they most likely do not exist.

Telescopes and microscopes are both optical instruments that use lenses to magnify and observe objects. They differ in their primary function: telescopes are designed to view objects that are far away, like celestial bodies in space, while microscopes are designed to view objects that are very small, like cells or microorganisms. Additionally, telescopes typically have larger objective lenses or mirrors compared to microscopes.

The resolving power of a telescope is the ability to produce an image in which objects that are close together can be seen separately.

Resolving power is sometimes expressed in terms of the inverse of the minimum angle there must be between two points in order to see them separated.

This minimum angle is proportional to (lambda/d) where d=diameter of objective

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Not intended to improve, just a comment:

Think of resolution and clarity as the telescopes Dots per Inch (DPI).

Low DPI , Poor resolution = blurry TV picture

'Best' DPI= High Definition.

Personally on my LX2080 I get better resolution at lower powers of magnification than very high.

The first optical telescope was invented in the early 17th century. Hans Lippershey, Zacharias Janssen, and Jacob Metius are often credited with its invention around the year 1608.

The angular resolution of a telescope in space above Earth's atmosphere is significantly improved compared to telescopes on the ground. With no atmospheric distortion, the telescope can achieve its diffraction limit, which is determined by the aperture size of the telescope and the wavelength of light. This allows for sharper, higher-resolution images of astronomical objects.

Reflecting telescopes are typically more cost-effective to build for larger apertures compared to refracting telescopes due to simpler construction and fewer optical components. Reflecting telescopes do not suffer from chromatic aberration like refracting telescopes, leading to sharper images with better color accuracy. Reflecting telescopes can also be made with larger apertures, allowing for better light-gathering capability and higher resolution for astronomical observations.

Reflecting telescopes use mirrors to collect and focus light, while refracting telescopes use lenses. Reflecting telescopes are typically less affected by chromatic aberration, while refracting telescopes can be more prone to this issue. Reflecting telescopes are generally more cost-effective for larger apertures.

An erecting lens is used in an astronomical telescope to right the image for terrestrial viewing. It can be placed between the objective and the ocular or be integrated in the eyepiece. Best regards Torbjoern

There were reports that the Bolognese Cesare Caravaggi had constructed one around 1626 and the Italian professor Niccolò Zucchi, in a later work, wrote that he had experimented with a concave bronze mirror in 1616, but said it did not produce a satisfactory image

Galileo's most famous invention was the telescope, which he used to make groundbreaking observations in astronomy. He made important discoveries about the moon, Jupiter's moons, and the phases of Venus thanks to his telescope.

The Copernican theory states that the Earth and other planets revolve around the sun, contrary to the previously held belief that everything revolved around the Earth. This theory revolutionized our understanding of the solar system and laid the foundation for modern astronomy. Nicolaus Copernicus, a Polish astronomer, proposed this idea in the 16th century.

Hydroelectricity is electricity produced by harnessing the power of flowing water to make energy. Though water power had been used for a number of mechanical tasks since ancient times, it wasn't until 1878 that the world's first hydroelectric power system was introduced.

It is best to view any of the planets listed when they are at their greatest eastern or western elongation. This is only a configuration that exists for planets closer to the sun than we are. Elongation refers to the angle of the planet from the sun from earth view. At greatest elongation, they have the farthest possible angle from the sun. This means that the planets are in a place in their orbit where they are brightest and most visible from earth.

For planets, farther from the sun than us on earth, the best possible time to view them is when they are in opposition. This refers to the planet being opposite the sun in the sky; this being the obvious opposite of the conjunction configuration where a planet appears behind the sun in the sky.

A telescope does two things; it produces a magnified (enlarged) image of what it is pointing at, and it collects more light than the "naked eye". This means that we can see things more clearly and we can see things that are further away. When Galileo turned his telescope towards Jupiter in early 1609, he was able to see it bigger and brighter than with the naked eye. He could also see Jupiter's four largest moons, which cannot be seen with the naked eye at all. Nowadays we also attach cameras to telescopes, and take long exposures of objects in the night sky. All the while that the camera is making its exposure, the telescope is gathering light. An exposure of, say, 4 minutes, will gather twice as much light as a 2 minute exposure. With long exposures, astronomers are able to obtain images of incredibly faint and distant objects.

Because cities have too much light pollution. They need to be in the dark - the darker the better. Also, when a ground based optical telescope (as opposed to a space telescope like the Hubble) looks up into the sky any image has to pass through the earth's atmosphere. In a city the air is often polluted and dusty, so looking through a telescope based there would produce a poor image - a bit like looking though a dirty window. On a mountain top the air is not only clean, but the atmosphere is less deep there because of the height of the mountain. The air above is less depth and cleaner so there is a better chance of a clearer image.

Advantages of X-ray telescopes include the ability to capture high-energy emissions from objects such as black holes and neutron stars, providing valuable information about these phenomena. However, X-ray telescopes are limited by Earth's atmosphere, which absorbs X-rays, necessitating the need for them to be placed in space. Additionally, X-ray telescopes tend to have lower resolution compared to optical telescopes.

A megaparsec is a unit of length used in astronomy to measure extremely large distances. It is equal to one million parsecs, where 1 parsec is approximately 3.26 light-years. Megaparsecs are commonly used to describe distances between galaxies or clusters of galaxies.

Galileo is the first recorded builder of the refracting telescope that I have been able to find. His doing so very nearly cost him his life as the church ruled science of the day and they felt his ideas were a real problem. He is reported to have spent the last 8 or 9 years of his life under 'house arrest'. -R. Edwards-Futurist

No, Mercury is largely grey, because of the composition of its surface. You can see this via the following links:

http://rst.gsfc.nasa.gov/Sect19/Sect19_7.html

http://blogs.discovermagazine.com/badastronomy/2008/10/29/the-colors-of-mercury/

http://www.sciencedaily.com/releases/2008/01/080123085313.htm

Mars is a reddish-brown because its surface is rich in iron as can be seen via the following links:

http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=31029

http://www.donaldedavis.com/PARTS/MARSCLRS.html

The temperate zones on the Moon refer to the regions near its poles that receive sunlight at a more oblique angle, resulting in more stable temperatures compared to the extreme heat and cold experienced in other areas. These regions may potentially have water ice deposits in permanently shaded craters due to the lack of direct sunlight.

Telescopic steering wheel means the distance between the steering wheel and the dash board can be adjusted. Like a telescope, you can move the steering wheel forward or backward. This feature allows the driver to adjust the distance of the steering wheel from the dash board as per his height and sitting position. The manual version is available in most of the cars. Some cars have the power version of this feature like Lexus ES 350.