Skip to main content

Questions tagged [very-large-telescope]

Questions about the VLT, a telescope facility operated by ESO in Chile.

Filter by
Sorted by
Tagged with
2 votes
1 answer
124 views

What does a narrow-band "point spread function" look like for long exposures from the VLT's large interferometric aperture?

In interferometric radio astronomy UV plots are the first step in understanding what a point spread function (PSF) will look like for a given location in the sky observed over a period of time. The ...
uhoh's user avatar
  • 30.7k
2 votes
1 answer
131 views

How do they know the non-uniformities seen on the disk of π¹ Gru are real and not artifacts?

@RobJeffries' answer to What is this web on the surface of the Sun? explains why convection cells on some other stars can be far larger than they are on our Sun and includes a near-infrared VLT ...
uhoh's user avatar
  • 30.7k
3 votes
2 answers
227 views

What would be the obstacles to building a 6.5km space telescope besides cost?

In the comments of another question on this Stack Exchange site, I talk with another user about the possibility of building an optical space telescope with a 6.5 km aperture. Obviously, this is much ...
nick012000's user avatar
5 votes
2 answers
213 views

What resolution would earth-moon telescope achieve?

Event horizon achieved earth-size telescope by using seperate telescopes around the world to interpolate an image of a black hole at resolution of 60 arcmicroseconds. What resolution could we get if ...
lietus's user avatar
  • 151
6 votes
1 answer
556 views

What is a pupil slicer, and how does it work with anamorphic optics in VLT's ESPRESSO Echelle spectrograph?

This excellent answer points to ESPRESSO, - Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations. From there I looked at the Instrument Description and Performance page. ...
uhoh's user avatar
  • 30.7k
6 votes
1 answer
437 views

How did VLT's adaptive optics obtain this resolution for Neptune? Is it really working in visible wavelengths?

This image of Neptune taken with the VLT is really impressive. The resolution is achieved by recent improvements in the adaptive optics. Gizmodo: New Super-Crisp Images of Neptune Show How Far Our ...
uhoh's user avatar
  • 30.7k