Anna this is the one I want to use as it has the cool the animations that may or may not work with webchat

2. Websters says:
Darkness (n) is the absence of light
Modern Physics says Light is:
- a particle = “photon” (and/or)
- a wave = “probability wave”
- has mass (or at least electro-mass)
- travels at 186,282 miles/sec (300,000 km/sec)
- measures distance (light year = 10,000,000,000,000 km)
So where isn‟t Light (=darkness)?
- empty space? (between galaxies?)
- in black holes? („cuz they‟re black?) Lehman Cave, Great Basin NP, NV
- underground! (caves and mines!)

3. What’s Darkness Anyway?
Anatomy says…
Light is the medium for vision Adverted Vision
- ~200 photons/sec per rod
- >150,000 rods/mm2 (Human retina)
- >1,000,000 rods/mm2 (Great Horned Owl retina)
So darkness is… Varying shades of gray?

4. What’s Darkness Anyway?
Math says… 1/15 sec
refresh rate
Light‟s intensity
diminishes at: S
4пr2
So darkness is…
Very Dispersed light?

5. Darkness is Noisy! So darkness sustains:
- Almost all amphibians
- Innumerable insects
Moth - Most mammals
- Frequently fish
- Bunches of birds
Owl Fish Lion
Frog

6. 9000 8882
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2973
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965
0
3 7 35 95 305
0.0 1.0
2.0 3.0
4.0 5.0
6.0 7.0 2.0 Visual Limiting Magnitude
(Urban Center >2 million)

7. 9000 8882
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7000
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2973
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1000
965
0
3 7 35 95 305
0.0 1.0
2.0 3.0
4.0 5.0
6.0 7.0 3.0 Visual Limiting Magnitude
(Urban Center ~1 million)

8. 9000 8882
8000
7000
6000
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3000
2973
2000
1000
0
3 7 35 95 305 965
0.0 1.0
2.0 3.0
4.0 5.0
6.0 7.0 4.0 Visual Limiting Magnitude
(City ~100,000)

9. 9000 8882
8000
7000
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2973
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1000
3 965
7 35 95 305
0
0.0 1.0
2.0 3.0
4.0 5.0
6.0 7.0 6.0 Visual Limiting Magnitude
(Town ~10,000)

10. 9000 8882
8000
7000
6000
5000
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2973
2000
1000
3 965
7 35 95 305
0
0.0 1.0
2.0 3.0
4.0 5.0
6.0 7.0 7.0 Visual Limiting Magnitude
(National Park / Village <1000)

11. Measuring Darkness
Images & Animation courtesy
of NPS Night Sky Team

15. Ambush Problem…

16. Ambush Problem…

20. Darkness Deficit Disorder
Confused animals & plants
Photography by Jim Richardson

21. Darkness Deficit Disorder
Confused animals & plants Zzzzz
Decline in human health
Melatonin
Mayo Clinic grades Melatonin:
Overcoming jetlag A
Sleep enhancement B
Removing free radicals C
Headache prevention C
Fighting CANCER C

22. If it’s
rare...
AND
beautiful... !
Capture it
And Charge Admiss
- P.T. “Greatest Show ON Earth” Barnum
So darkness is…

23. Sky City, AZ
Galaxy Diner, Hatch, UT
Night Astronomers Inn, AZ
Adventures, Red
River, NM

24. Profitable Tourism isn’t
more people per day
but Increased Length of Stay!
“Dark lovers stay overnight and
eat bigger breakfasts!”
- Kevin “Greatest Show FROM Earth” Poe

25. 2012
Bryce Canyon
~7,500 eclipse watchers
Astronomy Festival
1820 Laser Touri
Featuring Annular Eclipse
42 Staff, 117 VIPs
14,800 interpretive
contacts!
805 Jana Levin
Keynote Attendees
2,034 scope viewees
197 Rocketeers

26. In fy2012 Bryce Astronomy did:
- 349 Astro activities
- 142 formal presentations
- 52,383 contacts (~32,000 people)
- $2.022 mil (15% multiplier) to local economy!

27. Bryce Canyon 7.0 lm
Ursa Minor
“Baby Bear”
Ursa Major
“Mama Bear”

28. Acadia 6.5 lm
Ursa Minor
“Baby Bear”
Ursa Major
“Mama Bear”
Tyler Nordgren

29. Yosemite 6.0 lm
Procyon Cappellos
“Davy Crocket Hat”
Ursa Major
“Bear he kil’t when he was only 3”

30. Wasatch Front 4.5 lm
Stickum pointiend
“Harpoon”
Calamari tooyuckus
“Half-eaten Squid”

31. L.A. 2.5 lm
Coppers rescuedus
“Slim-jim”
Stillum Lockedoutus
“Bent coat hanger”

32. Globe
$40
($20)+$36.50
$ per year (10hrs night @ /$.10/kw)
Partial Cut-off
($30)+$27.38
$20
Night Sky Harm
$10
Motion Sensor *
($50)+$7.30
Mirrored Cut-off
$5 ($75)+$5.48 Solar
($7)+$0.00
$0
200 100 75 15 10
Watts of Energy
($x) = purchase price * On only when needed ~1hr / night