"He's your son!!" of APOD
- daveboling
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Introducing Comet Leonard
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
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Lunar Eclipse over a Skyscraper
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
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The Sun in X-rays from NuSTAR
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- chas
- Posts: 7707
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Re: "He's your son!!" of APOD
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.
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
"Our work puts heavy metal where it belongs -- as a music genre and not a pollutant in drinking water." -- Prof Ali Miserez.
Whorfin Woods
"Our work puts heavy metal where it belongs -- as a music genre and not a pollutant in drinking water." -- Prof Ali Miserez.
- daveboling
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Pleiades: The Seven Sisters Star Cluster
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
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- Please enter the next number in sequence: 8
- Location: Huntsville, AL
At the Shadow's Edge
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
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- Please enter the next number in sequence: 8
- Location: Huntsville, AL
Great Refractor and Lunar Eclipse
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
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- Please enter the next number in sequence: 8
- Location: Huntsville, AL
Messier 101
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
- antispam: No
- Please enter the next number in sequence: 8
- Location: Huntsville, AL
A High Cliff on Comet Churyumov-Gerasimenko
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
- antispam: No
- Please enter the next number in sequence: 8
- Location: Huntsville, AL
The Extraordinary Spiral in LL Pegasi
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
- antispam: No
- Please enter the next number in sequence: 8
- Location: Huntsville, AL
In Motion: Uranus and Moons
APOD video
dave boling
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
- antispam: No
- Please enter the next number in sequence: 8
- Location: Huntsville, AL
A Blue-Banded Blood Moon
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
- antispam: No
- Please enter the next number in sequence: 8
- Location: Huntsville, AL
NGC 6822: Barnard's Galaxy
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
- antispam: No
- Please enter the next number in sequence: 8
- Location: Huntsville, AL
Comet Leonard and the Whale Galaxy
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.
- daveboling
- Posts: 4950
- Joined: Sun Feb 17, 2002 6:00 pm
- antispam: No
- Please enter the next number in sequence: 8
- Location: Huntsville, AL
Iridescent by Moonlight
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'.
With Ron and Sid and Meg.
Ron stole Meggie's heart away
And I got Sidney's leg.
-- Douglas Adams
'Bundinn er bátlaus maðu'.