How to view the 2017 solar eclipse safely
From eclipse2017.nasa.gov/safety
A solar eclipse occurs when the moon
blocks any part of the sun. On Monday,
Aug. 21, 2017, a solar eclipse will be
visible (weather permitting) across all of
North America.
The whole continent will experience a
partial eclipse lasting 2-3 hours. Halfway
through the event, anyone within a roughly
70-mile-wide path from Oregon to South
Carolina (go.nasa.gov/2pC0lhe) will
experience a brief total eclipse, when the
moon completely blocks the sun’s bright
face for up to 2 minutes, 40 seconds, turn-
ing day into night and making visible the
otherwise hidden solar corona — the sun’s
outer atmosphere — one of nature’s most
awesome sights. Bright stars and planets
will become visible as well. (See graphic
at top right of page.)
Looking directly at the sun is unsafe
except during the brief total phase of a
solar eclipse (“totality”), when the moon
entirely blocks the sun’s bright face, which
will happen only within the narrow path
of totality.
The only safe way to look directly at
the uneclipsed or partially eclipsed sun is
through special-purpose solar filters, such
as “eclipse glasses” or hand-held solar
viewers. Homemade filters or ordinary
sunglasses, even very dark ones, are not
safe for looking at the sun.
To date, four manufacturers have
certified that their eclipse glasses and
handheld solar viewers meet the ISO
12312-2 international standard for such
products: Rainbow Symphony, American
Paper Optics, Thousand Oaks Optical and
TSE 17.
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Always inspect your solar filter before
use; if scratched or damaged, discard
it. Read and follow any instructions
printed on or packaged with the filter.
Always supervise children using solar
filters.
Stand still and cover your eyes with
your eclipse glasses or solar viewer
before looking up at the bright sun.
After glancing at the sun, turn away
and remove your filter – do not remove
it while looking at the sun.
Do not look at the uneclipsed or par-
tially eclipsed sun through an unfil-
tered camera, telescope, binoculars
or other optical device. Similarly, do
not look at the sun through a cam-
era, a telescope, binoculars or any
other optical device while using your
eclipse glasses or hand-held solar
viewer — the concentrated solar rays
will damage the filter and enter your
eye(s), causing serious injury. Seek
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expert advice from an astronomer
before using a solar filter with a
camera, a telescope, binoculars or any
other optical device.
If you are within the path of totality,
remove your solar filter only when
the moon completely covers the sun’s
bright face and it suddenly gets quite
dark. Experience totality, then as soon
as the bright sun begins to reappear,
replace your solar viewer to glance at
the remaining partial phases.
a solar filter or solar telescopes. These will
give you a magnified view that will clearly
show the progress of an eclipse. Never
look through a telescope without a solar
filter on the large end of the scope. And
never use small solar filters that attach
to the eyepiece (as found in some older,
cheaper telescopes).
Pinhole projectors – Pinhole projec-
tors and other projection techniques are a
safe, indirect viewing technique for observ-
ing an image of the sun. These provide a
popular way for viewing solar eclipses.
Related projection methods – One
viewing technique is to project an image
of the sun onto a white surface with a
projecting telescope. This is explained
further at http astrosociety.org/education/
publications/tnl/05/stars2.html.
The Exploratorium demonstrates how
to view a planet in transit or an eclipse
safely by projecting the image with bin-
oculars – exploratorium.edu/transit/how.
html. There are commercially available
projection telescopes as well.
An alternative method for safe view-
ing of the partially eclipsed sun is pin-
hole projection. For example, cross the
outstretched, slightly open fingers of one
hand over the outstretched, slightly open
fingers of the other. With your back to
the sun, look at your hands’ shadow on
the ground. The little spaces between
your fingers will project a grid of small
images on the ground, showing the sun
as a crescent during the partial phases of
the eclipse.
A solar eclipse is one of nature’s
grandest spectacles. By following these
simple rules, you can safely enjoy the
view and be rewarded with memories to
last a lifetime.
This document does not constitute
medical advice. Readers with questions
should contact a qualified eye-care pro-
fessional.
Additional Safety Information
An eclipse is a rare and striking phe-
nomenon you won’t want to miss, but you
must carefully follow safety procedures.
Don’t let the requisite warnings scare
you away from witnessing this singular
spectacle!
You can experience the eclipse safely,
but it is vital that you protect your eyes at
all times with the proper solar filters. No
matter what recommended technique you
use, do not stare continuously at the sun.
Take breaks and give your eyes a rest!
Do not use sunglasses; they don’t
offer your eyes sufficient protection. One
excellent resource for safe solar eclipse
viewing is at nasa.gov/content/eye-safety-
during-a-total-solar-eclipse.
Viewing with protection – Experts
suggest that one widely available filter
for safe solar viewing is No. 14 welder’s
glass. It is imperative that the welding
hood houses a No.14 or darker filter. Do
not view through any welding glass if you
do not know or cannot discern its shade
number. Be advised that arc welders typi-
cally use glass with a shade much less than
the necessary No. 14. A welding glass
that permits you to see the landscape is
not safe. Inexpensive eclipse glasses have
special safety filters that appear similar
to sunglasses, but these do permit safe
viewing.
Telescopes with solar filters –
Eclipses are best viewed directly when
magnified, which means a telescope with
Confederated Tribes of Siletz Indians
Annual Nesika Illahee Pow-Wow
August 11~13, 2017
THURSDAY
AUG. 10
Royalty Pageant
6:00 PM
FRIDAY
AUG. 11
Memorial / Giveaways
12:00 Noon ~ 5:00 PM
All
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Welcome!
Event
Categories:
Presentation of Crown
6:00 PM
Grand Entry
7:00 PM
SATURDAY
Golden Age • Adult • Teen • Youth
AUG. 12
(Teen & Youth Preliminaries Occur Friday Night)
Parade
10:00 AM
(Dance Competition Points
Awarded for Parade
Participation)
Specials:
• Men’s Fancy Dance
(Sponsored by Plummie Wright)
Grand Entry
1:00 PM & 7:00 PM
• Team Dance
• Womens’ Basketcap (Open)
• Round Bustle (Open)
SUNDAY
Vendor Registration is Required. Camping Fee: $25 + $5 per pet.
Campground Open Thursday 7:00 AM. No Campfires.
For More Information, Call:
Buddy Lane, 800-922-1399, x-1230.
AUG. 13
Grand Entry
12:00 Noon
Salmon Dinner
Pauline Ricks Memorial Pow-Wow Grounds, Government Hill, Siletz, OR
July 2017
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Siletz News
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