Sky and Telescope - January 2016 - 24
BIG SKY COUNTRY The surrounding mountain peaks
are cloudy, but the Snake River Plain basks in sunshine
in this view to the north from the Craters of the Moon
National Monument in Idaho - one of the sunniest
places along the eclipse path.
one: 99.6% of the Sun's disk area will be obscured. (This
corresponds to an eclipse magnitude of 0.994, the fraction
of the Sun's diameter to be covered.) Boise still makes a
good starting point for the 85-mile drive via Interstate 84
to reach the centerline.
The eclipse track crosses the Sawtooth Range and
descends onto the Snake River Plain. Although Idaho
Falls is 21 miles south of the eclipse path's central line,
it still enjoys 1¾ minutes of totality. Another 30 seconds
can be gained by traveling to the path's midpoint.
"Great" eclipse weather should be the norm for the
Two Eclipse-Planning Essentials
Authors Fred Espenak and Jay Anderson have
collaborated on many eclipse-related publications
for more than 20 years. Now retired, they've reunited
to publish Eclipse Bulletin: Total Solar Eclipse of 2017
August 21. It's filled with tables, charts, maps, weather
data, and eclipse circumstances for more than 1,000
cities in the U.S. and elsewhere. Go to eclipsewise.
com/pubs/TSE2017.html for more information.
Separately, Espenak recently published Road Atlas
for the Total Solar Eclipse of 2017, a book of detailed
road maps covering the entire path from Oregon to
South Carolina. The track is plotted in 20-second
steps, making it easy to estimate the duration of totality from any location along the eclipse path. To learn
more, visit eclipsewise.com/pubs/Atlas2017.html.
Both of these useful publications are available from
ShopatSky.com.
- J. Kelly Beatty
24
Januar y 2016 sky & telescope
portion of the path on the lee side of the Cascade Range.
Air flowing downward into the valleys warms and dries
out, yielding the lowest average cloud cover along the
entire track. Airport statistics show that mean cloudiness drops to roughly 25% in both Oregon's Columbia
Basin and in Idaho's Snake River Plain. The percent of
possible sunshine - the best measure of the true probability of seeing the eclipse - exceeds 80%.
Wyoming and Nebraska
Next the umbra climbs over the Teton Range and enters
Grand Teton National Park in Wyoming. The grandeur
of the Tetons normally draws many thousands of visitors
each summer - adding a total solar eclipse makes the
region even more attractive as a travel destination. At
Jackson Hole's airport, which lies right on the centerline,
totality lasts 2m 20s centered on 11:36 a.m. MDT.
The shadow track crosses the Continental Divide in
the Wind River Range and descends to the high plains
of the Cowboy State. Casper is the largest Wyoming city
in the path, and the centerline passes through the south
side of the city, giving spectators a total eclipse lasting
2m 26s. (Although the longest totality will be seen 980
miles farther east in Carbondale, Illinois, Casper's duration is only 14 seconds shy of it.)
Casper is well served by highways running east and
west through the eclipse path. This gives eclipse chasers
with mobility the option to move if weather becomes an
issue. In fact, the Astronomical League has chosen Casper
to hold its annual convention just days before the eclipse
for this very reason (astrocon2017.astroleague.org).
Historical data suggest a gradual increase in cloudiness as the eclipse path moves eastward across Wyoming
JAY ANDERSON
Planning for Totality
http://www.eclipsewise.com/pubs/TSE2017.html
http://www.eclipsewise.com/pubs/TSE2017.html
http://www.eclipsewise.com/pubs/Atlas2017.html
http://www.ShopatSky.com
http://astrocon2017.astroleague.org
Sky and Telescope - January 2016
Table of Contents for the Digital Edition of Sky and Telescope - January 2016
Contents
Sky and Telescope - January 2016 - Cover1
Sky and Telescope - January 2016 - Cover2
Sky and Telescope - January 2016 - 1
Sky and Telescope - January 2016 - Contents
Sky and Telescope - January 2016 - 3
Sky and Telescope - January 2016 - 4
Sky and Telescope - January 2016 - 5
Sky and Telescope - January 2016 - A
Sky and Telescope - January 2016 - B
Sky and Telescope - January 2016 - 6
Sky and Telescope - January 2016 - 7
Sky and Telescope - January 2016 - 8
Sky and Telescope - January 2016 - 9
Sky and Telescope - January 2016 - 10
Sky and Telescope - January 2016 - 11
Sky and Telescope - January 2016 - 12
Sky and Telescope - January 2016 - 13
Sky and Telescope - January 2016 - 14
Sky and Telescope - January 2016 - 15
Sky and Telescope - January 2016 - 16
Sky and Telescope - January 2016 - 17
Sky and Telescope - January 2016 - 18
Sky and Telescope - January 2016 - 19
Sky and Telescope - January 2016 - 20
Sky and Telescope - January 2016 - 21
Sky and Telescope - January 2016 - 22
Sky and Telescope - January 2016 - 23
Sky and Telescope - January 2016 - 24
Sky and Telescope - January 2016 - 25
Sky and Telescope - January 2016 - 26
Sky and Telescope - January 2016 - 27
Sky and Telescope - January 2016 - 28
Sky and Telescope - January 2016 - 29
Sky and Telescope - January 2016 - 30
Sky and Telescope - January 2016 - 31
Sky and Telescope - January 2016 - 32
Sky and Telescope - January 2016 - 33
Sky and Telescope - January 2016 - 34
Sky and Telescope - January 2016 - 35
Sky and Telescope - January 2016 - 36
Sky and Telescope - January 2016 - 37
Sky and Telescope - January 2016 - 38
Sky and Telescope - January 2016 - 39
Sky and Telescope - January 2016 - 40
Sky and Telescope - January 2016 - 41
Sky and Telescope - January 2016 - 42
Sky and Telescope - January 2016 - 43
Sky and Telescope - January 2016 - 44
Sky and Telescope - January 2016 - 45
Sky and Telescope - January 2016 - 46
Sky and Telescope - January 2016 - 47
Sky and Telescope - January 2016 - 48
Sky and Telescope - January 2016 - 49
Sky and Telescope - January 2016 - 50
Sky and Telescope - January 2016 - 51
Sky and Telescope - January 2016 - 52
Sky and Telescope - January 2016 - 53
Sky and Telescope - January 2016 - 54
Sky and Telescope - January 2016 - 55
Sky and Telescope - January 2016 - 56
Sky and Telescope - January 2016 - 57
Sky and Telescope - January 2016 - 58
Sky and Telescope - January 2016 - 59
Sky and Telescope - January 2016 - 60
Sky and Telescope - January 2016 - 61
Sky and Telescope - January 2016 - 62
Sky and Telescope - January 2016 - 63
Sky and Telescope - January 2016 - 64
Sky and Telescope - January 2016 - 65
Sky and Telescope - January 2016 - 66
Sky and Telescope - January 2016 - 67
Sky and Telescope - January 2016 - 68
Sky and Telescope - January 2016 - 69
Sky and Telescope - January 2016 - 70
Sky and Telescope - January 2016 - 71
Sky and Telescope - January 2016 - 72
Sky and Telescope - January 2016 - 73
Sky and Telescope - January 2016 - 74
Sky and Telescope - January 2016 - 75
Sky and Telescope - January 2016 - 76
Sky and Telescope - January 2016 - 77
Sky and Telescope - January 2016 - 78
Sky and Telescope - January 2016 - 79
Sky and Telescope - January 2016 - 80
Sky and Telescope - January 2016 - 81
Sky and Telescope - January 2016 - 82
Sky and Telescope - January 2016 - 83
Sky and Telescope - January 2016 - 84
Sky and Telescope - January 2016 - Cover3
Sky and Telescope - January 2016 - Cover4
Sky and Telescope - January 2016 - S0
Sky and Telescope - January 2016 - S1
Sky and Telescope - January 2016 - S2
Sky and Telescope - January 2016 - S3
Sky and Telescope - January 2016 - S4
Sky and Telescope - January 2016 - S5
Sky and Telescope - January 2016 - S6
Sky and Telescope - January 2016 - S7
Sky and Telescope - January 2016 - S8
Sky and Telescope - January 2016 - S9
Sky and Telescope - January 2016 - S10
Sky and Telescope - January 2016 - S11
Sky and Telescope - January 2016 - S12
https://www.nxtbook.com/nxtbooks/aas/st_202410
https://www.nxtbook.com/nxtbooks/aas/st_202409
https://www.nxtbook.com/nxtbooks/aas/st_202408
https://www.nxtbook.com/nxtbooks/aas/st_202407
https://www.nxtbook.com/nxtbooks/aas/st_202406
https://www.nxtbook.com/nxtbooks/aas/st_202405
https://www.nxtbook.com/nxtbooks/aas/st_202404_qr
https://www.nxtbook.com/nxtbooks/aas/st_202404
https://www.nxtbook.com/nxtbooks/aas/st_202403
https://www.nxtbook.com/nxtbooks/aas/st_202402
https://www.nxtbook.com/nxtbooks/aas/st_202401_aus
https://www.nxtbook.com/nxtbooks/aas/st_202401
https://www.nxtbook.com/nxtbooks/aas/st_202312_aus
https://www.nxtbook.com/nxtbooks/aas/st_202312
https://www.nxtbook.com/nxtbooks/aas/st_202311
https://www.nxtbook.com/nxtbooks/aas/st_202310
https://www.nxtbook.com/nxtbooks/aas/st_202309
https://www.nxtbook.com/nxtbooks/aas/st_202308
https://www.nxtbook.com/nxtbooks/aas/st_202307
https://www.nxtbook.com/nxtbooks/aas/st_202306
https://www.nxtbook.com/nxtbooks/aas/st_202305
https://www.nxtbook.com/nxtbooks/aas/st_202304
https://www.nxtbook.com/nxtbooks/aas/st_202304_qr
https://www.nxtbook.com/nxtbooks/aas/st_202303
https://www.nxtbook.com/nxtbooks/aas/st_202302
https://www.nxtbook.com/nxtbooks/aas/st_202301
https://www.nxtbook.com/nxtbooks/aas/st_202212
https://www.nxtbook.com/nxtbooks/aas/st_202211
https://www.nxtbook.com/nxtbooks/aas/st_202210
https://www.nxtbook.com/nxtbooks/aas/st_202209
https://www.nxtbook.com/nxtbooks/aas/st_202208
https://www.nxtbook.com/nxtbooks/aas/st_202207
https://www.nxtbook.com/nxtbooks/aas/st_202206
https://www.nxtbook.com/nxtbooks/aas/st_202205
https://www.nxtbook.com/nxtbooks/aas/st_202204
https://www.nxtbook.com/nxtbooks/aas/st_202203
https://www.nxtbook.com/nxtbooks/aas/st_202202
https://www.nxtbook.com/nxtbooks/aas/st_202201
https://www.nxtbook.com/nxtbooks/aas/st_202112
https://www.nxtbook.com/nxtbooks/aas/st_202111
https://www.nxtbook.com/nxtbooks/aas/st_202110
https://www.nxtbook.com/nxtbooks/aas/st_202109
https://www.nxtbook.com/nxtbooks/aas/st_202108
https://www.nxtbook.com/nxtbooks/aas/st_202107
https://www.nxtbook.com/nxtbooks/aas/st_202106
https://www.nxtbook.com/nxtbooks/aas/st_202105
https://www.nxtbook.com/nxtbooks/aas/st_202104
https://www.nxtbook.com/nxtbooks/aas/st_202103
https://www.nxtbook.com/nxtbooks/aas/st_202102
https://www.nxtbook.com/nxtbooks/aas/st_202101
https://www.nxtbook.com/nxtbooks/aas/skywatch_2021
https://www.nxtbook.com/nxtbooks/aas/st_202012
https://www.nxtbook.com/nxtbooks/aas/st_202011
https://www.nxtbook.com/nxtbooks/aas/st_202010
https://www.nxtbook.com/nxtbooks/aas/st_202009
https://www.nxtbook.com/nxtbooks/aas/st_202008
https://www.nxtbook.com/nxtbooks/aas/st_202007
https://www.nxtbook.com/nxtbooks/aas/st_202006
https://www.nxtbook.com/nxtbooks/aas/st_202005
https://www.nxtbook.com/nxtbooks/aas/st_202004
https://www.nxtbook.com/nxtbooks/aas/st_202003
https://www.nxtbook.com/nxtbooks/aas/st_202002
https://www.nxtbook.com/nxtbooks/aas/st_202001
https://www.nxtbook.com/nxtbooks/aas/st_201912
https://www.nxtbook.com/nxtbooks/aas/st_201911
https://www.nxtbook.com/nxtbooks/aas/st_201910
https://www.nxtbook.com/nxtbooks/aas/st_201909
https://www.nxtbook.com/nxtbooks/aas/st_201908
https://www.nxtbook.com/nxtbooks/aas/st_201907
https://www.nxtbook.com/nxtbooks/aas/st_201906
https://www.nxtbook.com/nxtbooks/aas/st_201905
https://www.nxtbook.com/nxtbooks/aas/st_201904
https://www.nxtbook.com/nxtbooks/aas/st_201903
https://www.nxtbook.com/nxtbooks/aas/st_201902
https://www.nxtbook.com/nxtbooks/aas/st_201901
https://www.nxtbook.com/nxtbooks/aas/st_201812
https://www.nxtbook.com/nxtbooks/aas/st_201811
https://www.nxtbook.com/nxtbooks/aas/st_201810
https://www.nxtbook.com/nxtbooks/aas/st_201809
https://www.nxtbook.com/nxtbooks/aas/st_201808
https://www.nxtbook.com/nxtbooks/aas/st_201807
https://www.nxtbook.com/nxtbooks/aas/st_201806
https://www.nxtbook.com/nxtbooks/aas/st_201805
https://www.nxtbook.com/nxtbooks/aas/st_201804
https://www.nxtbook.com/nxtbooks/aas/st_201803
https://www.nxtbook.com/nxtbooks/aas/st_201802
https://www.nxtbook.com/nxtbooks/aas/st_201801
https://www.nxtbook.com/nxtbooks/aas/st_201712
https://www.nxtbook.com/nxtbooks/aas/st_201711
https://www.nxtbook.com/nxtbooks/aas/st_201710
https://www.nxtbook.com/nxtbooks/aas/st_201709
https://www.nxtbook.com/nxtbooks/aas/st_201708
https://www.nxtbook.com/nxtbooks/aas/st_201707
https://www.nxtbook.com/nxtbooks/aas/st_201706
https://www.nxtbook.com/nxtbooks/aas/st_201705
https://www.nxtbook.com/nxtbooks/aas/st_201704
https://www.nxtbook.com/nxtbooks/aas/st_201703
https://www.nxtbook.com/nxtbooks/aas/st_201702
https://www.nxtbook.com/nxtbooks/aas/st_201701
https://www.nxtbook.com/nxtbooks/aas/st_201612
https://www.nxtbook.com/nxtbooks/aas/st_201611
https://www.nxtbook.com/nxtbooks/aas/st_201610
https://www.nxtbook.com/nxtbooks/aas/st_201609
https://www.nxtbook.com/nxtbooks/aas/st_201608
https://www.nxtbook.com/nxtbooks/aas/st_201607
https://www.nxtbook.com/nxtbooks/aas/st_201606
https://www.nxtbook.com/nxtbooks/aas/st_201605
https://www.nxtbook.com/nxtbooks/aas/st_201604
https://www.nxtbook.com/nxtbooks/aas/st_201603
https://www.nxtbook.com/nxtbooks/aas/st_201602
https://www.nxtbook.com/nxtbooks/aas/st_201601
https://www.nxtbook.com/nxtbooks/aas/st_201512
https://www.nxtbook.com/nxtbooks/aas/st_201511
https://www.nxtbook.com/nxtbooks/aas/st_201510
https://www.nxtbook.com/nxtbooks/aas/st_201509
https://www.nxtbook.com/nxtbooks/aas/st_201508
https://www.nxtbook.com/nxtbooks/aas/st_201507
https://www.nxtbook.com/nxtbooks/aas/st_201506
https://www.nxtbook.com/nxtbooks/aas/st_201505
https://www.nxtbook.com/nxtbooks/aas/st_201504
https://www.nxtbook.com/nxtbooks/aas/st_201503
https://www.nxtbook.com/nxtbooks/aas/st_201502
https://www.nxtbook.com/nxtbooks/aas/st_201501
https://www.nxtbook.com/nxtbooks/aas/st_201412
https://www.nxtbook.com/nxtbooks/aas/st_201411
https://www.nxtbook.com/nxtbooks/aas/st_201410
https://www.nxtbook.com/nxtbooks/aas/st_201409
https://www.nxtbook.com/nxtbooks/aas/st_201408
https://www.nxtbook.com/nxtbooks/aas/st_201407
https://www.nxtbook.com/nxtbooks/aas/st_201406
https://www.nxtbook.com/nxtbooks/aas/st_mars
https://www.nxtbook.com/nxtbooks/aas/st_201405
https://www.nxtbook.com/nxtbooks/aas/st_201404
https://www.nxtbook.com/nxtbooks/aas/st_201403
https://www.nxtbook.com/nxtbooks/aas/st_201402
https://www.nxtbook.com/nxtbooks/aas/st_201401
https://www.nxtbook.com/nxtbooks/aas/st_201312
https://www.nxtbook.com/nxtbooks/aas/st_201311
https://www.nxtbook.com/nxtbooks/aas/st_201310
https://www.nxtbook.com/nxtbooks/aas/st_201309
https://www.nxtbook.com/nxtbooks/aas/st_201308
https://www.nxtbook.com/nxtbooks/aas/st_201307
https://www.nxtbook.com/nxtbooks/aas/st_201306
https://www.nxtbook.com/nxtbooks/aas/st_201305
https://www.nxtbook.com/nxtbooks/aas/st_201304
https://www.nxtbook.com/nxtbooks/aas/st_201303
https://www.nxtbook.com/nxtbooks/aas/st_201302
https://www.nxtbook.com/nxtbooks/aas/st_201301
https://www.nxtbook.com/nxtbooks/aas/st_201212
https://www.nxtbook.com/nxtbooks/aas/st_201211
https://www.nxtbook.com/nxtbooks/aas/st_201210
https://www.nxtbook.com/nxtbooks/aas/st_201209
https://www.nxtbook.com/nxtbooks/aas/st_201208
https://www.nxtbook.com/nxtbooks/aas/st_201207
https://www.nxtbook.com/nxtbooks/aas/st_201206
https://www.nxtbook.com/nxtbooks/aas/st_201205
https://www.nxtbook.com/nxtbooks/aas/st_201204
https://www.nxtbook.com/nxtbooks/aas/st_201203
https://www.nxtbook.com/nxtbooks/aas/st_201202
https://www.nxtbook.com/nxtbooks/aas/st_201201
https://www.nxtbook.com/nxtbooks/aas/st_201112
https://www.nxtbook.com/nxtbooks/aas/st_201111
https://www.nxtbook.com/nxtbooks/aas/st_201110
https://www.nxtbook.com/nxtbooks/aas/st_201109
https://www.nxtbook.com/nxtbooks/aas/st_201108
https://www.nxtbook.com/nxtbooks/aas/st_201107
https://www.nxtbook.com/nxtbooks/aas/st_201106
https://www.nxtbook.com/nxtbooks/aas/st_201105
https://www.nxtbook.com/nxtbooks/aas/st_201104
https://www.nxtbook.com/nxtbooks/aas/st_201103
https://www.nxtbook.com/nxtbooks/aas/st_201102
https://www.nxtbook.com/nxtbooks/aas/st_201101
https://www.nxtbook.com/nxtbooks/aas/st_201012
https://www.nxtbook.com/nxtbooks/aas/st_201011
https://www.nxtbook.com/nxtbooks/aas/st_201010
https://www.nxtbook.com/nxtbooks/aas/st_201009
https://www.nxtbook.com/nxtbooks/aas/st_201008
https://www.nxtbook.com/nxtbooks/aas/st_201007
https://www.nxtbook.com/nxtbooks/aas/st_201006
https://www.nxtbook.com/nxtbooks/aas/st_201005
https://www.nxtbook.com/nxtbooks/aas/st_201004
https://www.nxtbook.com/nxtbooks/aas/st_201003
https://www.nxtbook.com/nxtbooks/aas/st_201002
https://www.nxtbook.com/nxtbooks/aas/st_201001
https://www.nxtbookmedia.com