He was among the first to use a telescope to observe the sky and after constructing a 20x refractor telescope he discovered the four largest moons of Jupiter in 1610.

Additionally, he did fundamental work in the field of optics, invented an improved version of the refracting telescope (the Keplerian Telescope), and mentioned the telescopic discoveries of his contemporary Galileo Galilei.

Meanwhile, Le Verrier by letter urged Berlin Observatory astronomer Johann Gottfried Galle to search with the observatory's refractor.

Discovery and naming Amalthea was discovered on September 9, 1892, by Edward Emerson Barnard using the 36 inch (91 cm) refractor telescope at Lick Observatory.

Unit Telescopes 1 4 are since known as Antu (Sun), Kueyen (Moon), Melipal (Southern Cross), and Yepun (Evening Star) respectively.

I can guide a missile by satellite, by satellite, by satellite!

Hubble is the Hubble Space Telescope, a space telescope.

As a proof of the concept, he constructed a telescope using a mirror as the objective to bypass that problem.

Tom wants a telescope.

Tom looked through the telescope.

A more recent Earth mission, not related to the Explorer program, was the Hubble Space Telescope, which as mentioned above was brought into orbit in 1990.

It hosts the Southern African Large Telescope, the largest optical telescope in the southern hemisphere.

You need to collimate the telescope.

Hubble is a space telescope.

Tom is looking through the telescope.

Galileo did not invent the telescope.

The 8.2 m diameter telescopes are housed in compact, thermally controlled buildings, which rotate synchronously with the telescopes.

Hubble was not the first telescope launched into space, nor is it the largest telescope at astronomers disposal.

This telescope must be used carefully.

Images were obtained through the Ralph telescope.

Johannes claims include that his father invented the telescope in 1590, that his father invented the telescope in 1604, that he and his father invented the telescope in 1618, and that Jacob Metius and Cornelis Drebbel bought a telescope from him and his father in 1620 and copied it.

I adjusted the telescope to my vision.

You can see the stars using a telescope.

You can see the stars using a telescope.

The OSO and OAO missions demonstrated the important role space based observations could play in astronomy, and in 1968, NASA developed firm plans for a space based reflecting telescope with a mirror 3 m in diameter, known provisionally as the Large Orbiting Telescope or Large Space Telescope (LST), with a launch slated for 1979.

Roy Gould and Curtis Wong preview the WorldWide Telescope

And so WorldWide Telescope will be available this spring.

And so, here's an image from the Hubble Space Telescope.

With this telescope stars and dreams can be seen.

They are using a telescope to look at the sky.

I purchased a telescope and a book on astronomy.

The separate components can be resolved with binoculars, a telescope, or the naked eye.

Telescopes may also be classified by location ground telescope, space telescope, or flying telescope.

Bopp did not own a telescope.

Because they thought that if you are having a telescope, you are an astronomer so what you are doing is actually looking in a telescope.

And the bigger the telescope, the bigger that universe becomes.

The telescope, going up in space, it unfolds in two places.

Do you know the difference between a microscope and a telescope?

The world's largest telescope is in the Canary Islands.

1990 STS 31 The Hubble Space Telescope is launched from the Space Shuttle Discovery .

Hubble Space Telescope was launched in 1990 and revolutionized astronomy.

The Hubble Space Telescope recently took a picture of the remnants of this event.

Data releases The Kepler team originally promised to release data within one year of observations.

The E ELT will be the largest optical near infrared telescope in the world.

The new telescope was shipped in a huge wooden box.