Telescopes

Galileo observed phases of Venus, which were only possible if Venus orbited the Sun and not Earth, supporting the heliocentric model of the solar system proposed by Copernicus. This observation was a key piece of evidence in favor of the heliocentric theory.

actually you can, but it all depends on the weather. In 2006, you could see Discovery docking with the International Space Station during the twilight hours in clear weather.

"The appearance of either the Space Shuttle or the International Space Station moving across the sky is not in itself unusual. Truth be told, on any clear evening within a couple of hours of local sunset and with no optical aid, you can usually spot several orbiting Earth satellites creeping across the sky like moving stars. Satellites become visible only when they are in sunlight and the observer is in deep twilight or darkness. This usually means shortly after dusk or before dawn".

http://www.space.com/spacewatch/060629_shuttle_spotting.html

Eris can be seen in a telescope when it is at its closest approach to Earth, typically during opposition when it is opposite the Sun in the sky. Eris is located in the outer solar system in the Kuiper Belt, so it is quite small and faint, requiring a large telescope and dark skies to observe.

In this sentence, "In 1609" and "Galileo" would be classified as a time period and a proper noun, respectively.

At the time, using a telescope to observe the night sky was a new and controversial idea. Many astronomers were skeptical of Galileo's findings and methods, preferring to rely on traditional instruments and observations. Additionally, telescopes were expensive and not widely available, which may have limited their adoption among fellow astronomers.

Three problems come to mind: 1. Light polution -- harder and harder to find a truly dark place on the Earth's surface, and the atmosphere carries the light, so you can't really fix the problem by repositioning. 2. Atmostphere. The atmosphere absords a LOT of light. 3. Weight of the optics. Large enough mirror optics distort under their own weight. While formulation can get around this to some extent, it presents a difficult problem that doesn't occur in zero G.

Yes, "Telescope" is a compound word made up of the two words "tele" and "scope."

Galileo made several important discoveries with his telescope, including the four largest moons of Jupiter (now known as the Galilean moons), the phases of Venus, sunspots on the Sun, and mountains and craters on the Moon. These observations provided evidence to support the heliocentric model of the solar system and challenged the geocentric view of the universe.

There are fundamentalists in many faiths. First of all, the person that you are speaking with must accept that what your seeing is 6000 light years away. To my surprise I have had some creationist say that the Earth APPEARS to be as old as it is but that 6000 years ago God made it LOOK that way. Can you also believe that in the Bible it says that the Moon shines over the night and that is why some say that the Moon irradiates light?

If you and your adversary do not have common ground to start on then your debate is no longer a debate but an argument.

Start with what you have in common first then go from there.

A binocular telescope is a type of telescope that is designed for viewing with both eyes simultaneously. It offers a more immersive and three-dimensional viewing experience compared to a monocular telescope. Binocular telescopes are often used for astronomy, bird watching, and other outdoor activities.

The largest refracting telescope in Wisconsin is located at the Yerkes Observatory in Williams Bay. Built in the 1890s, the Yerkes Observatory's 40-inch refracting telescope is one of the largest of its kind and was once the largest in the world.

Space junk is not really a discovery. Humans put it there. We've got large quantities of junk orbiting our planet because we don't pick up after ourselves. It's not really any more of a discovery than litter is. There's no Christopher Columbus of litter, and that's basically what space junk is. So I can't really tell you who.

Newton realized that mirrors do not cause chromatic aberrations, and built a telescope using them.

Ability to detect radio waves is not a property of optical telescopes. Optical telescopes are designed to detect and focus visible light to form images of distant objects in space. Radio telescopes, on the other hand, are specifically designed to detect and study radio waves emitted by celestial objects.

It is not essential to have a secondary mirror on a Newtonian telescope, but the reason there is one is for practicality. If you mounted an eyepiece at the focus of the primary mirror, your head would be directly in the light path, blocking much of the light from entering the tube. The same reason applies to cameras, but with modern CCD cameras being circular and small, it is possible to mount one at the focus of the primary mirror. Indeed, doing this may block less light than a secondary mirror would, certainly in the case of a large aperture instrument (for example 300mm and above.)

Yes, it is safe to look at Venus through a telescope. Venus is bright enough not to cause any harm to your eyes when viewed through a telescope. Make sure not to look directly at the sun when observing Venus to avoid damaging your eyes.

launched in 1989 by NASA

studied cosmic background radiation

viewed in infrared and microwaves

it was a space telescope and needed to be kept cool as it observed in infrared

wasn't very sensitive but it confirmed ideas about early universe

finished it's mission in 1993

Yes, the Hubble Space Telescope has significantly improved space exploration by providing detailed images of distant galaxies, nebulae, and other celestial objects. It has helped scientists expand our understanding of the universe and has made groundbreaking discoveries, such as the age of the universe and the existence of dark matter.

Ground-based telescopes are typically larger and more cost-effective than space telescopes. They can be easily upgraded and repaired, and have the ability to be built in remote locations for better viewing conditions. Additionally, ground-based telescopes benefit from continuous improvements in technology and instrumentation.

Hans Lippershey, also known as Jan or Hans Lippersheim, was born around 1570 (exact date unknown) in Wesel, western Germany. After settling in the Netherlands, he became a maker of spectacles. Lippershey is credited with creating the design for the first practical telescope, after experimenting with different sized lenses. Lippershey is thought to be the first to apply for a patent for his design of an early telescope in 1608, as his patent application is the earliest record of an actually existing telescope. He demonstrated his invention before the Dutch Parliament on 2 October 1608, calling it a "kijker", meaning "looker" in Dutch. The patent was ultimately denied because it was believed that the details of his invention could not be kept secret. However, Lippershey went on to make several binocular telescopes for the States General.

The astronomer Galileo Galilei created a working design of the telescope in 1609 after receiving a description of Lippershey's invention.

No, Galileo was not the first person to look through a telescope. The invention of the telescope is credited to Hans Lippershey, a Dutch eyeglass maker, around 1608. Galileo improved upon the design and used it to make groundbreaking astronomical discoveries.

The diameter of the telescope aperture determines how much light the telescope can gather, which impacts the brightness and detail of the images it can produce. A larger aperture means more light can be collected, allowing for clearer and sharper views of celestial objects.

Neptune, Uranus, the dwarf planet Pluto, and all the exoplanets. 837 exoplanets had been discovered as at 2012-Sep-07. Mars, Venus, Jupiter, Saturn, Mercury and obviously Earth can be seen with the naked eye. All the rest were discovered by telescope. Seeing as we don't have warp drive, hyper-space or inter-dimensional travel, there is no other way to discover a planet except by observation. This is always done through a telescope, whether it be visible spectrum, IR, UV, radio etc

There is also some discussion that Neptune and Pluto were discovered by noticing the variation in the orbits of other planets. After the maths was done, telescopes were pointed at where we thought the source of the orbital variation would be, and Neptune and Pluto were discovered. So was the time of discovery, when we did the maths or when we first observed them through a telescope ... ?