Telescopes

The astronomer whose treatise was named 'Panchasiddhantika' was Varahamihira, an ancient Indian mathematician and astronomer who made significant contributions to the field of astronomy.

About 9:27pm roughly for the penumbral phase, 10:pm umbral start

It takes a year for the planets to circle around the sun because of their gravitational pull and the sun's size and mass. The time it takes for a planet to orbit the sun is determined by its distance from the sun and its orbital speed. These factors combined result in a year-long orbital period for each planet.

You can see Venus in the evening sky just after sunset and Saturn in the early morning sky just before sunrise. The visibility of planets depends on their position relative to the Sun, so the best times to see them without a telescope change throughout the year.

Optical telescopes are used to study electromagnetic energy in the form of visible light. This allows astronomers to observe and study objects in the universe, such as stars, planets, galaxies, and other celestial bodies that emit or reflect visible light.

Telescopes typically use convex lenses (also called objective lenses) to gather and focus light from distant objects. These lenses help magnify the images and make distant objects appear closer and more detailed. Eyepieces with different magnifications are then used to further enhance the view.

When we observe stars through a telescope, we are seeing light that has traveled vast distances to reach us. Since light takes time to travel these distances, we are essentially seeing the star as it was in the past. For example, if a star is located 1000 light-years away, we are observing light that left the star 1000 years ago, so we are seeing the star as it was 1000 years ago.

Astronomical telescopes have big apertures to collect more light from distant objects in space. Larger apertures allow telescopes to gather more photons, resulting in brighter and more detailed images of celestial objects. This helps astronomers see fainter objects, study them in more detail, and gather more information about the universe.

To observe Mars' rotation using a telescope, you would need to locate the planet in the night sky and track its position over several nights. By observing specific surface features or markings on Mars, such as its polar ice caps or dark surface patches, you can track its rotation period which is roughly 24.6 hours. Note that Mars rotates in the same direction as Earth, so you would need to observe at the same time each night to see the same features.

Answer #2: Unfortunately, JWST's launch date has been pushed back many times (Which isn't always a bad thing!). It's current tentative deployment date is sometime in 2018.

Not yet! It's still being built! The very soonest it would launch is 2014. And after it is launched, it will take another 6 months for the telescope to be deployed, to cool down to its operating temperature, and for its systems to be checked out and adjusted.

A space telescope produces clearer images because it is above Earth's atmosphere, which can distort and blur light from space. By being in space, the telescope eliminates the atmospheric turbulence that can affect the quality of images produced by Earth-based telescopes. This allows space telescopes to capture sharper and more detailed images of celestial objects.

A telescope diaphragm is used to control the amount of light entering the telescope. By adjusting the size of the diaphragm, astronomers can regulate the brightness and contrast of the observed objects, improving visibility and clarity.

Both reflecting telescopes and microscopes use mirrors to focus light instead of lenses. They both have an objective mirror that collects and reflects light to form an image. The primary function of both instruments is to magnify and produce clear images of distant or small objects.

An LED reflector is a type of lighting fixture that contains light emitting diodes (LEDs) and a reflective surface to direct and enhance the light output. They are commonly used in outdoor lighting applications, such as sports fields, parking lots, and architectural lighting, due to their energy efficiency and long lifespan.

Scientist investigate the early universe by observing objects that are extremely far away in space.Beause it takes time for light to travel through space,looking through a telescope is like looking back in time one travels. Looking at distant galaxies evolve through time and perhaps what caused them to form in the first place.Scientiiist have already found some very strange looking objects in the Early universe.

You need to rotate the lenses round to get the best magnification then use the wheels on the side to bring it into focus. If this does not meet your requirement's then you need a better microscope.

Of conventional Telescopes the 200 Inch reflector at Mount Palomar also c alled the Hale telescope(from its designer) is probaly the top tube. for produc tion models there was an all-aluminum 72 Inch reflector in an altazimuth mount which was made by the then Kaiser aluminum corporation and was exhibited in the science section of Disneyland for many years, perhap still around. it resembed a mamoth theodolite.

East to west.

First answer by N4CUZ1.

To clarify, the sidereal day is the time it takes the earth to complete one rotation. i.e. One Day. So, depending on your telescopes mounting, equatorial primarily, the drive should rotate in the opposite direction of the earth's rotation to maintain an object in your view finder. Hence, west to east.

Cheers.

Just like any antenna used to collect electromagnetic energy at any other frequency,

the 'gain' is proportional to the antenna's area. Since the area varies as the square of

the collector's diameter, doubling the diameter increases the gain by a factor of 22 = 4.

The corresponding increase in gain is 6 dB.

Benjamin Banneker used a reflecting telescope that he built himself in the 18th century. This telescope was made entirely from wood and had a unique design with a 6-foot focal length. Banneker used his telescope to observe the stars and make detailed calculations for his almanacs.

Scientists send a variety of instruments and equipment to space to research space, such as telescopes, satellites, rovers, and even human astronauts. These tools help gather data on planets, stars, galaxies, and other celestial bodies, as well as study the effects of microgravity and space travel on living organisms.

The Hubble Space Telescope is repaired by sending Space Shuttle missions to it. Astronauts conduct repairs, upgrades, and maintenance tasks during these missions. They replace faulty components, install new instruments, and perform tests to ensure the telescope's functionality.

The Keck telescopes are optical, so no. The only possible exception being the super-luminous flash of Hawking radiation that theoretically occurs in certain-sized black holes, although orbital telescopes have a much better chance of detecting this light. Most of the electromagnetic radiation emitted from black holes has energies in the range of x-rays, an energy range that the Keck telescopes aren't designed for.

However, the most likely way that a black hole will be experimentally proven to exist is through the indirect method of measuring stellar orbits. Believe it or not, simple calculations from the ultra-precise, Keplerian orbital measurements of distant stars can be made to show the necessary size and mass of whatever object it is those stars are orbiting. If that size and mass fit the necessary conditions required of black holes, then there's your proof. The Keck telescopes are VERY well-equipped to make those kinds of measurements.

If an object is too far to be seen in a telescope, adjusting the focus of the object lens will not bring it into view. In such cases, the telescope may need to be repositioned or pointed towards a different direction in the sky to locate the object within the field of view. Additionally, using larger telescopes with a wider field of view may also help in locating distant objects.

HST gets its power from 2 large solar panels, located on either side of the spacecraft's main body. They are programmed to move to the optimal angle for sunlight absorption as it orbits the Earth, regardless of the angle of the spacecraft itself.

The original arrays were replaced on HST Servicing Mission 1 in December 1993, due to extensive warping caused by the constant change in thermal temperatures as it passed through the day/night terminator orbiting the Earth every 90 minutes. The arrays installed during SM1 were replaced on Servicing Mission 3B in March 2002. The new ones are much heavier, more efficient, and designed to better withstand the extreme thermal changes, which can go from 140°C to - 140°C.