ASTR 3 Lecture Notes - Lecture 9: Tunguska Event, Orbital Period, Meteor Crater
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These are absorption lines and are also determined by the composition of the gas. We use the spectrometer to separate all the colors, so that we see the colors of light with different wavelengths. The red light just goes right through to the ground. When at sunset, the light from the sun is blocked more by the atmosphere (thicker atmosphere), when the blue is scattered away. Here we see the red light during sunset. Microwave telescopes: important to understand the big bang. Infrared telescopes: challenge: the earth is a strong infrared source. To make observations, we need to get far away from earth. Ultraviolet telescopes: atmosphere blocks the light, so these also have to go to space. Challenge: hard to build a mirror to deflect it. But if each mirror bends a bit, the x-ray deflects a bit. Ppt9. 3: focuses back on the camera with multiple bent mirrors. Gamma-(cid:28645)(cid:28660)(cid:28684) (cid:28679)(cid:28664)(cid:28671)(cid:28664)(cid:28678)(cid:28662)(cid:28674)(cid:28675)(cid:28664)(cid:28678): (cid:28663)(cid:28674)(cid:28673)"(cid:28679) (cid:28663)(cid:28664)(cid:28665)(cid:28671)(cid:28664)(cid:28662)(cid:28679), (cid:28661)(cid:28680)(cid:28679) (cid:28682)(cid:28664) (cid:28662)(cid:28660)(cid:28673) calculate to generate images.
