"He's your son!!" of APOD

Socializing and general posts on wide-ranging topics. Remember, it's Poststructural!
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daveboling
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Introducing Comet Leonard

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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Lunar Eclipse over a Skyscraper

Post by daveboling »

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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The Sun in X-rays from NuSTAR

Post by daveboling »

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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chas
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Re: "He's your son!!" of APOD

Post by chas »

I believe the NuStar mirrors were the first made with a really cool technique. X-ray mirrors can only reflect at very grazing angles, so to increase the collection aperture, they nest a whole bunch of mirrors. Each mirror is very thin. They've generally been made with electroforming -- electroplate something like nickel or rhodium onto a stainless-steel mandrel and somehow separate the mirror from the mandrel.

These mirrors were made by placing a thin piece of glass on a heated mandrel and letting the glass sag till it takes on the shape of the mandrel. It's quicker and cheaper than electroforming, so they can make dozens of them and pick the best for the flight optics. I think this was also the first mission to use multilayer "super-mirror" coatings that increase the reflectance, especially at higher energies.
Charlie
Whorfin Woods
"You do not throw rocks at a man with a machine gun." -- Rowdy Roddy Piper
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daveboling
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Pleiades: The Seven Sisters Star Cluster

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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At the Shadow's Edge

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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Great Refractor and Lunar Eclipse

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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Messier 101

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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A High Cliff on Comet Churyumov-Gerasimenko

Post by daveboling »

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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The Extraordinary Spiral in LL Pegasi

Post by daveboling »

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I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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In Motion: Uranus and Moons

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APOD video
dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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A Blue-Banded Blood Moon

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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NGC 6822: Barnard's Galaxy

Post by daveboling »

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dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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daveboling
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Comet Leonard and the Whale Galaxy

Post by daveboling »

Image
dave boling
I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams

'Bundinn er bátlaus maðu'.
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