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Why does infrared pass through clouds of gas and dust with minimal extinction?

Why do we use Infrared to view through clouds of gas and dust in space? I understand that it is because it can pass through without being absorbed, but why is this? My thinking is that it is because ...
Astrovis's user avatar
  • 1,097
2 votes
1 answer
100 views

How do the stars in the near-infrared (NIR) radiate?

Let's say we are studying the integrated near-infrared (NIR) light of a distant spiral galaxy. We would expect most of this light to be dominated by red giants stars and dwarfs. I assumed these stars ...
Astroturf's user avatar
  • 1,111
0 votes
1 answer
147 views

First Confirmed Visual Observation of Gravitational Lensing

Is it possible to identify the first direct observation of the gravitational lensing? What object was lensed, and where did the energy detected fall on the electromagnetic spectrum?
BigNutz's user avatar
  • 117