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James Webb Space Telescope (JWST) NASA

James Webb Space Telescope (JWST) NASA

Event Horizon Telescope The James Webb Space Telescope About Webb's Orbit The James Webb Space Telescope will observe primarily the infrared light from faint and very distant objects. But all objects, including telescopes, also emit infrared light. To avoid swamping the very faint astronomical signals with radiation from the telescope, the telescope and its instruments must be very cold. The L2 orbit is an elliptical orbit about the semi-stable second Lagrange point . In three of the solutions found by Lagrange, the bodies are in line (L1, L2, and L3); in the other two, the bodies are at the points of equilateral triangles (L4 and L5). In the case of Webb, the 3 bodies involved are the Sun, the Earth and the Webb. Other infrared missions have selected an L2 orbit, like WMAP and H2L2. Here are a few graphics that illustrate how far away Webb will be. (Note that these graphics are not to scale.) Astronomy Cast has a podcast on Lagrange points that you may find interesting.

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SDSS Facebook accueil plasma Accueil > Erreur 404 Erreur 404 MAGIC - The MAGIC Telescope Web Server on La Palma The Earth's most powerful telescope goes online next week The Moon is a particularly good place to do neutrino physics because of the the cosmic ray backgrounds underground. On Earth, at sea level, cosmic rays are mostly due to high-energy protons interacting with the upper atmosphere. These collisions create a lot of pions. Because the atmosphere isn't very dense, these pions don't slow down very quickly, and so when they decay into muons the muons are still extremely energetic. On the Moon, with no atmosphere to speak of, the primary cosmic-ray protons smack into solid rock, so the pions are created in that very dense medium and almost all of them slow way down before decaying, so the muons only have the muons are much lower energy and penetrate a very short distance.

The Liverpool Telescope