Modern Telescopes and Ancient Skies
... the ESO VLT An exoplanet orbits a brown dwarf “star” at a distance of about 55 AU (the star and planet are about 200 light years away) ...
... the ESO VLT An exoplanet orbits a brown dwarf “star” at a distance of about 55 AU (the star and planet are about 200 light years away) ...
International Reporter, India 07-24-06 A Glimpse at the Future of Our Sun
... or clouds analogous to sunspots, shock waves generated by pulsating envelopes, or even planets. “The typical belief is that stars have to be symmetric gas balls,” said Ragland, an interferometer specialist. “But 30 percent of these red giants showed asymmetry, which has implications for the last sta ...
... or clouds analogous to sunspots, shock waves generated by pulsating envelopes, or even planets. “The typical belief is that stars have to be symmetric gas balls,” said Ragland, an interferometer specialist. “But 30 percent of these red giants showed asymmetry, which has implications for the last sta ...
Measuring the size of small things Stellar Diameters Atmospheric Cherenkov Telescopes
... “I hung up a light rope in the direction of a star . . . and then by approaching and retreating from this cord placed between me and the star, I found the point where its width just hid the star from me. This done, I found the distance of my eye from the co ...
... “I hung up a light rope in the direction of a star . . . and then by approaching and retreating from this cord placed between me and the star, I found the point where its width just hid the star from me. This done, I found the distance of my eye from the co ...
Telescopes & Light: Part 3 All About Telescopes
... used in tandem to observe the same object at the same time (telescopes combined in such a way are called an interferometer). • The effective diameter is equivalent to the distance between the outermost dishes. The larger diameter results in much better angular resolution. ...
... used in tandem to observe the same object at the same time (telescopes combined in such a way are called an interferometer). • The effective diameter is equivalent to the distance between the outermost dishes. The larger diameter results in much better angular resolution. ...
problems
... Q1. List three advantages of reflecting telescopes over refracting telescopes. Q3. How does Earth’s atmosphere affect what is seen through an optical telescope? Q9. What is interferometry, and what problem in radio astronomy does it address? Q14. What are the main advantages of studying objects at m ...
... Q1. List three advantages of reflecting telescopes over refracting telescopes. Q3. How does Earth’s atmosphere affect what is seen through an optical telescope? Q9. What is interferometry, and what problem in radio astronomy does it address? Q14. What are the main advantages of studying objects at m ...
Name: :______Date:
... 11. What can star spectra tell about a star? __________________________________________________________________________ 12. Scientists can look at light of galaxies that tell them how fast they are moving __________________________________________________________________________ 13. Almost all galax ...
... 11. What can star spectra tell about a star? __________________________________________________________________________ 12. Scientists can look at light of galaxies that tell them how fast they are moving __________________________________________________________________________ 13. Almost all galax ...
Tools of Astronomy
... separates light of stars into bands of color. scientists can guess the gases/elements of the star. ...
... separates light of stars into bands of color. scientists can guess the gases/elements of the star. ...
Very Large Telescope
The Very Large Telescope (VLT) is a telescope operated by the European Southern Observatory on Cerro Paranal in the Atacama Desert of northern Chile. The VLT consists of four individual telescopes, each with a primary mirror 8.2 m across, which are generally used separately but can be used together to achieve very high angular resolution. The four separate optical telescopes are known as Antu, Kueyen, Melipal and Yepun, which are all words for astronomical objects in the Mapuche language. The telescopes form an array which is complemented by four movable Auxiliary Telescopes (ATs) of 1.8 m aperture.The VLT operates at visible and infrared wavelengths. Each individual telescope can detect objects roughly four billion times fainter than can be detected with the naked eye, and when all the telescopes are combined, the facility can achieve an angular resolution of about 0.001 arc-second (This is equivalent to roughly 2 meters resolution at the distance of the Moon).In single telescope mode of operation angular resolution is about 0.05 arc-second.The VLT is the most productive ground-based facility for astronomy, with only the Hubble Space Telescope generating more scientific papers among facilities operating at visible wavelengths. Among the pioneering observations carried out using the VLT are the first direct image of an exoplanet, the tracking of individual stars moving around the supermassive black hole at the centre of the Milky Way, and observations of the afterglow of the furthest known gamma-ray burst.