Sky and Telescope - July 2017 - 73

sections are hinged so they fold down
out of the way when not in use.
David Lazaroff has made a clever
design using the plastic spout from a
detergent jug. The front end has a nifty
cross-hair design molded in, so all
David had to do was remove the opaque
back and glue a translucent plastic
cap from a spray bottle on it. He then
sanded the screw thread section of the
spout to fit the curve of his telescope,
threaded a piece of nylon cord through
holes in the spout, and added a cord
lock to hold the whole works in place.
When aimed at the Sun, it projects a
beautiful cross hair on the end cap.
You can undoubtedly come up with
several designs of your own. Just about
anything that casts a shadow or a bright
spot on a screen will do, as long as
you're not magnifying the Sun's intensity through a lens.
Happy hunting - and finding!

Things Are Looking Up
Especially when you have these
essential guides from S&T stars

Pocket
Poc
Po
P
oc
o ket
ket Sky
S k y Atl
Sk
A
Atlas
tla
tl
la
as
by
by Roger
Roger
Ro
Rog
er W.
W. Sinnott
Sinnot
Si
Sin
nott
tt
9 5 plus
p lus
l us
u shipping
s hip
sh
ship
ip ping
i
in
59317
$19.
59
59
593
9317
17 $
$1
19
9.. 95

¢ Contributing Editor JERRY OLTION

Star
S
Sta
tar T
Trails
rails
rai
ils
H.. Levy
by David
by
Dav
avid H
Lev
evy
y
95 plus
p
plus
lus shipping
ship
shipping
ipping
p ping
p g
59461
$24.
5
594
9461
94 6
61
1 $2
$
24
24
4.. 95

Binocular
B
Bin
inocu
oc lar
la Hi
H
Highlights
ighl
ghligh
ig ts
ts
by
by Gary
Gar y Seronik
Seronik
nik
k
p lus shipping
ship
p ping
g
59430
594
5
9 30 $24.
$ 4.
$2
4. 955 plus

888-253-0230 shopatsky.com

enjoys looking at the Sun whenever it
deigns to come out, which is about twice
a year as seen from his home in the
Pacific Northwest.

✦

Design

✦

Manufacturing

✦

Installation

✦

Retrofitting

✦

Perfectly Practical,
Practically Perfect

DAVID L A Z A ROFF

SHARE YOUR INNOVATION
º Do you have a telescope
or ATM observing accessory
that S&T readers would enjoy
knowing about? Email your
projects to Jerry Oltion at
j.oltion@gmail.com.

photo: European Space Agency, NASA

The detergent jug spout includes a convenient target frame.

DFM Engineering, Inc.
1035 Delaware Ave., Unit D
Longmont, CO USA 80501
Phone 303-678-8143
Fax 303-772-9411
sales@dfmengineering.com
www.dfmengineering.com

✦

Optical Servicing

✦

Upgrades / Repairs

✦

Observatory Design Consulting

s k y a n d t e l e s c o p e .c o m

✦

* J U LY 2 017

73



http://www.shopatsky.com http://www.dfmengineering.com http://www.skyandtelescope.com

Sky and Telescope - July 2017

Table of Contents for the Digital Edition of Sky and Telescope - July 2017

Contents
Sky and Telescope - July 2017 - Cover1
Sky and Telescope - July 2017 - Cover2
Sky and Telescope - July 2017 - 1
Sky and Telescope - July 2017 - Contents
Sky and Telescope - July 2017 - 3
Sky and Telescope - July 2017 - 4
Sky and Telescope - July 2017 - 5
Sky and Telescope - July 2017 - 6
Sky and Telescope - July 2017 - 7
Sky and Telescope - July 2017 - 8
Sky and Telescope - July 2017 - 9
Sky and Telescope - July 2017 - 10
Sky and Telescope - July 2017 - 11
Sky and Telescope - July 2017 - 12
Sky and Telescope - July 2017 - 13
Sky and Telescope - July 2017 - 14
Sky and Telescope - July 2017 - 15
Sky and Telescope - July 2017 - 16
Sky and Telescope - July 2017 - 17
Sky and Telescope - July 2017 - 18
Sky and Telescope - July 2017 - 19
Sky and Telescope - July 2017 - 20
Sky and Telescope - July 2017 - 21
Sky and Telescope - July 2017 - 22
Sky and Telescope - July 2017 - 23
Sky and Telescope - July 2017 - 24
Sky and Telescope - July 2017 - 25
Sky and Telescope - July 2017 - 26
Sky and Telescope - July 2017 - 27
Sky and Telescope - July 2017 - 28
Sky and Telescope - July 2017 - 29
Sky and Telescope - July 2017 - 30
Sky and Telescope - July 2017 - 31
Sky and Telescope - July 2017 - 32
Sky and Telescope - July 2017 - 33
Sky and Telescope - July 2017 - 34
Sky and Telescope - July 2017 - 35
Sky and Telescope - July 2017 - 36
Sky and Telescope - July 2017 - 37
Sky and Telescope - July 2017 - 38
Sky and Telescope - July 2017 - 39
Sky and Telescope - July 2017 - 40
Sky and Telescope - July 2017 - 41
Sky and Telescope - July 2017 - 42
Sky and Telescope - July 2017 - 43
Sky and Telescope - July 2017 - 44
Sky and Telescope - July 2017 - 45
Sky and Telescope - July 2017 - 46
Sky and Telescope - July 2017 - 47
Sky and Telescope - July 2017 - 48
Sky and Telescope - July 2017 - 49
Sky and Telescope - July 2017 - 50
Sky and Telescope - July 2017 - 51
Sky and Telescope - July 2017 - 52
Sky and Telescope - July 2017 - 53
Sky and Telescope - July 2017 - 54
Sky and Telescope - July 2017 - 55
Sky and Telescope - July 2017 - 56
Sky and Telescope - July 2017 - 57
Sky and Telescope - July 2017 - 58
Sky and Telescope - July 2017 - 59
Sky and Telescope - July 2017 - 60
Sky and Telescope - July 2017 - 61
Sky and Telescope - July 2017 - 62
Sky and Telescope - July 2017 - 63
Sky and Telescope - July 2017 - 64
Sky and Telescope - July 2017 - 65
Sky and Telescope - July 2017 - 66
Sky and Telescope - July 2017 - 67
Sky and Telescope - July 2017 - 68
Sky and Telescope - July 2017 - 69
Sky and Telescope - July 2017 - 70
Sky and Telescope - July 2017 - 71
Sky and Telescope - July 2017 - 72
Sky and Telescope - July 2017 - 73
Sky and Telescope - July 2017 - 74
Sky and Telescope - July 2017 - 75
Sky and Telescope - July 2017 - 76
Sky and Telescope - July 2017 - 77
Sky and Telescope - July 2017 - 78
Sky and Telescope - July 2017 - 79
Sky and Telescope - July 2017 - 80
Sky and Telescope - July 2017 - 81
Sky and Telescope - July 2017 - 82
Sky and Telescope - July 2017 - 83
Sky and Telescope - July 2017 - 84
Sky and Telescope - July 2017 - Cover3
Sky and Telescope - July 2017 - Cover4
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