What are dark nebulae? This Week in Astronomy with Dave Eicher

 



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Darkish nebulae are totally different from common nebulae — they block mild as a substitute of emitting or reflecting it.

Hello people, tune in each week of 2023 for the most effective in astronomy from Astronomy Editor Dave Eicher, dropped at you by Celestron. Dave’s weekly video collection will cowl all the most recent sky occasions, scientific outcomes, overviews of cosmic mysteries, and extra!

This week, we’re speaking about darkish nebulae — objects within the night time sky seen not by their brilliance, however by the shadows they solid in opposition to a brighter background.

Video transcript:

Welcome to This Week in Astronomy, dropped at you by Celestron, the world’s main producer of telescopes. I’m Dave Eicher, editor of Astronomy, and we’re going to speak about one thing bizarre at this time. You’ve most likely heard of an odd sort of nebula — a darkish nebulae.

Properly what are these items? You could have heard of some darkish nebulae. There are some well-known ones just like the Horsehead Nebula in Orion or the well-known Coalsack in Crux within the Southern Hemisphere. These are clouds of interstellar dust out within the galaxy. And these block mild from stars and from different objects behind them.

They usually’re fabricated from actually tiny particles — very small particles, in regards to the dimension of these in smoke. However there are such a lot of of those particles in these clouds that they’ll block starlight and different issues from past. So it’s a difficult solution to get on the market and take a look at one other sort of deep-sky object in our galaxy.

Within the early 1900s, Edward E. Barnard, a well-known astronomer, grew to become even extra well-known by cataloging these darkish nebulae. You’ll find the Barnard catalogue on-line and draw up a listing of targets, in the event you’d prefer to, of darkish nebulae to exit and take a look at in a darkish sky, if you will get to 1, together with your binoculars or your Celestron telescope.

It is a good time of 12 months — the spring and the summer time, particularly in the summertime Milky Way. Head on the market, get a listing of darkish nebulae you’d prefer to see and also you’ll see one other sort of creature that lives in our galaxy. I’ll see you subsequent time!

[End of transcript.]

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