Recent comments in /f/space

danielravennest t1_j7mbh4v wrote

We use survey telescopes to look for asteroids. Typically they have been much smaller than the research telescopes. This is about to change with the Rubin Observatory which has an 8 meter mirror, putting into the research size range.

This telescope has a 3200 megapixel camera, and a wide field of view. It will survey the sky frequently, looking for anything that changes (moving asteroids and comets, variable stars, planetary transits, etc.)

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Thorazine88 t1_j7ltmx5 wrote

I believe the issue is “Which is better: 1. A water deluge system which pours a huge amount of water between the rocket exhaust and the concrete pad. 2. A pool of water underneath the rocket exhaust.” I’m guessing a pool of water wouldn’t be as good because the rocket exhaust would blow hot water and steam everywhere in an uncontrolled manner.

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