How far can an astronomical telescope see 500 times

Amateur astronomers generally control the multiples of mirrors within 200 times, and less than 100 times to see the moon. The landlord said that 500 times is too general, can you be specific. Almost 70 times you can see Jupiter's extreme moons, Saturn's rings.

The main standard time aperture of the telescope, that is, the size of the armed police, purely on imaging, the multiple is not the most important, as long as the time is long enough.

Ask such a simple question, be careful of being blocked!

Multiples are not what determines how far you can see, but how far you can see.

The farthest distance that an astronomical telescope can observe is 20 billion light-yearsThis is the extent of the total galaxy. The part of the universe that we observe is often referred to as the total galaxy. It has also been suggested that a total galaxy is a higher level of celestial bodies than galaxies, and that its scale may be smaller, equal to, or larger than the part of the universe that can be observed.

The typical size of total galaxies is about 10 billion light-years and their age is on the order of 10 billion years.

How astronomical telescopes workAstronomical telescopes work on the principle that the objective lens is focused on the image, which is magnified by the eyepiece. The light is concentrated by the objective lens and then magnified by the eyepiece, which is a double-separated structure to improve the image quality. Since Galileo Galilei built the first telescope in 1609, telescopes have continued to develop, from optical bands to full bands, from the ground to space, telescopes have become more and more observant and can capture more and more celestial information.

Large astronomical telescopes can see celestial objects at the edge of the universe, including various nebulae, galaxies, star clusters, etc., at a distance of up to 15 billion light-years. How far to see and how far to see are two different concepts. As long as the visible light enters your eyes, it can be counted as being seen by you, so its theoretical value is infinity.

The larger the area, the more light collected, the clearer the image, and the pupil of the human eye is equivalent to the light gathering capacity of a circular surface with a diameter of 4 mm. The purpose of an astronomical telescope is to increase the receiving area of your eye. Therefore, how far you can see is mainly determined by the aperture of the objective lens of the astronomical telescope.

Common sense for astronomical telescopes

In fact, "how far you can see" depends entirely on the brightness of the object being observed, as long as the target is bright enough to see infinity without a telescope, for example, the 6,000 or so stars that we can see with the naked eye can actually be considered infinite.

The question of "how big to enlarge" is a question that arises due to a lack of basic knowledge of astronomy, because the "stars in the sky" we see are all stars, and the stars are so far away from us that even with the largest telescope on earth, they are still just geometric highlights (the smaller the bright spots, the higher the quality of the telescope's optical imaging).

Conversely, if a star is seen in a telescope with an optical surface or even a color, it can be concluded that its optical system has serious defects), and only those objects in the solar system (such as the sun, planets, moons, comets, etc.) or objects outside the solar system with visual surfaces (such as nebulae, galaxies, star clusters, etc.) can be magnified with the help of telescopes.

The telescope didn't look far. Depending on the resolution and aperture, it can be said that the telescope can see how far away the object is in detail. For example, an astronomical telescope with a resolution of arc seconds can resolve details on the moon up to 180 meters in size.

The ordinary astronomical mirror is also called the universal astronomical telescope, which varies from 200 to 1000 away, and has a variety of classifications such as refractor and reflector, with a magnification of about 15-70. A good telescope, a little more professional, due to the addition of equipment such as the equatorial mount, the lens is well-made, so it is much higher, 2000 to tens of thousands are possible, and the magnification is about 20-150.

How far the telescope can see is the reason for the error.

Our naked eye is an optical instrument, and we can see the Great Andromeda Nebula 2.54 million light-years away, but we can't see Proxima Centa-centauri, the closest extrasolar star to Earth. I believe everyone has already realized that it is meaningless to say how far an optical instrument can see, only how far can you see the clearest, or how far you can see clearly.

Different astronomical telescopes have different types and specifications, and they also have different observation performance. In general, the larger the aperture and magnification of an astronomical telescope, the more observant it is and the more details it can observe.

Astronomical telescopes can see a distance of four or five kilometers.

Because the earth is round, the farthest distance is only four or five kilometers, and the farther is below the horizon. So even an astronomical telescope can only see so far. Using an astronomical telescope ** The ground scene is not interesting, and the effect is not as good as that of a monocular birdwatching scope.

Astronomical telescopes are generally sold on the market, and the surface of Mars, Saturn, Jupiter, the Moon and other stars can be observed about 100 times.

Choose a mirror with high precision:

In the case of guaranteed accuracy, the caliber of the mirror can be close to the theoretical resolution. So the higher the accuracy of the mirror, the higher the **. For example, the same 150 caliber mirror, a ball cow reflector is about 1,000 yuan, and a hyperboloid mirror is close to 10,000 yuan.

That's the difference in accuracy. As for how to distinguish the accuracy, just choose a well-known manufacturer and enthusiasts with a good reputation.

The maximum distance can reach 15 billion light years.

Telescope.

It is the main tool for observing celestial bodies and capturing celestial information. From 1609 Galileo.

Since the first telescope was built, the telescope has continued to evolve, from the optical band to the full band, from the ground to space, the telescope has become more and more observant, and more and more celestial information can be captured. Humans in the electromagnetic band, neutrinos.

Gravitational waves, cosmic rays, etc. are all expected telescopes.

Space is a good place for astronomical observations. Due to the absence of shielding and interference from the Earth's atmosphere, many types of astronomical telescopes are located in space. Most of these observers are well-designed and fully functional, some of which function as both telescopes and detectors.

Refractors. A refracting telescope is a telescope that uses a lens crop mirror. There are two types: by concave lenses.

The one used as an eyepiece is called a Galilean refractor; by convex lenses.

The one that makes the eyepiece is called Kepler.

refractors. Because the chromatic aberration and spherical aberration of single-lens objectives are quite severe, the apochromatic system is commonly used in modern refracting telescopes.

Most refracting telescopes use the Kepler structure. Because the imaging quality of refracting telescopes is better than that of reflecting telescopes, the field of view is large, it is easy to use and easy to maintain, small and medium-sized astronomical telescopes and many special instruments mostly use refractive systems, but large refractive telescopes are much more difficult to manufacture than reflecting telescopes, because it is very difficult to smelt high-quality lenses with large apertures, and the mass of large lenses is huge, and it is inconvenient to operate.

Ordinary astronomical telescopes are affected by factors such as atmospheric stability, atmospheric transparency, surrounding light pollution, brightness of observed celestial bodies, and the quality of optical lenses, and the celestial objects that can be seen are limited to Jupiter, Saturn, Mars, and Venus.

Astronomical telescopes 20 times more than the best:

Astronomical telescopes are based on different imaging principles, and generally buy astronomical telescopes, with a larger field of view of 20 times, and you can start to observe carefully.

Telescope magnification for children:

1. Children are more suitable for large-aperture, small-magnification telescopes.

2. The pupil diameter of children at night can reach about 7mm, if you observe at night, it is recommended to choose binoculars with an exit pupil diameter of about 7mm For example, 7x50, if you observe during the day, it is recommended to choose a binoculars with an exit pupil diameter of about 5mm For example, 6x32

3. Try to choose a refractive telescope. The refractor is easy to operate, intuitive to observe, easy to maintain, long service life, easy for children to master when using the operation skills, and easy to find and track when targeting.

4. The aperture of the telescope should not be larger than 100 mm. Because of the large aperture, not only is it expensive, but the more bulky the telescope. From the perspective of children's physical strength, it will reduce the use rate of telescopes, and the fun of stargazing will be impossible, and the equipment will inevitably be idle.

The author recommends telescopes with a caliber of 70 to 80 mm.

5. Try to choose products with equatorial mount. The equatorial mount is not only easy to operate when tracking and looking for targets, but more importantly, it has a concept of right ascension and denim, as long as you master this concept, if you need to buy any other advanced and complex telescope in the future, you will be familiar with it.

6. Equipped with a 45-degree positive image prism. At present, most of the astronomical telescopes on the market are equipped with 90-degree zenith mirrors. In this way, the telescope's imaging is upside down, up and down, which has no effect on astronomical observations.

Because the celestial objects in the telescope are generally spherical in shape, or a point.

7. Telescope: Combined with the current telescope market, the refractor of 100 mm and ordinary optical glass, according to the workmanship, accessories, and metal materials, is generally between 500 yuan and 3000 yuan (low-end inferior products are not included), if it is higher than this, it belongs to the relatively professional level. <>