Dedicated to the safe observation of the
A Total Solar Eclipse is Coming to the United States!

Get your eclipse glasses NOW!
(You're going to need them!)
Your use of this site is contingent on your understanding and agreement that you have read this link, you agree with its contents, and you will comply with all the rules of common sense and well established protocols for eye safety when observing any solar phenomenon.
"...And we'll see YOU... in the shadow!!"

Latest News

2017 Eclipse Blog / FAQ



Why does the eclipse go from West to East?

The Sun and Moon both appear to “rise” in the east, and “set” in the west. But as you can see in our video of the Moon’s shadow sweeping across the USA, it plainly travels from west to east!

This is a very good question, because it shows how … Read More »



Magnitude vs. obscuration?

Whenever eclipse geeks are talking about their calculations, they always need to make sure they are careful to distinguish as to whether they’re talking about “magnitude” or “obscuration”. In case you’d like to understand this, too, here is a quick explanation.

I’m going to use the word “percentage” below, … Read More »



What do I do with the glasses when the eclipse is over?

Great question!

 

The eclipse glasses contain a very special filter material that is ISO certified to be completely safe for direct solar viewing. So, as long as … Read More »



“Eclipse” glasses, or “Partial Eclipse” glasses?

Why are they called “eclipse glasses”? Do you need them if you’re in the path? What about if you’re not in the path?

glasses2(You WILL need them – get … Read More »



How many states does the total eclipse touch?

EASY!

Twelve – I mean, fourteen – I mean, essentially 12; realistically 12 – but no – REALLY 14!

…or is it…? Hmmm….. Let’s see –

The path of totality for the 2017 eclipse passes over the continental USA from coast to coast – the first time this has happened … Read More »



Tell me the best place to watch the eclipse from!

Easy! Someplace in the path of totality, where the weather is clear on eclipse day!

a_rev

(How’s that for committing to an answer?!)

But seriously, beyond that general recommendation, eclipse2017.org can’t … Read More »



How fast is the shadow moving across the US during the eclipse?

A great question! The Moon does indeed “carry” its shadow along with it, as it moves in its orbit around the Earth.

shadow_scrape

And whenever that shadow happens to … Read More »



The eclipse2017.org app is live for Android and iOS!

This is the SIMPLEST app to use, of all the apps out there.

100% Ad-free! (even in the free version!)

And NO Astronomy degree required! Simply give it your location, and it’ll tell you whether you’re in the path of totality or not, and also when the eclipse happens … Read More »



Can I wear eclipse glasses over my regular eyeglasses?

Yes, you can certainly put them over regular eyeglasses, as I myself do!

The reality is that these “eclipse glasses” are really solar filters, and are designed to be used for only a brief time; people will hold them over their eyes, to get a view of the partially-eclipsed … Read More »



I have a department-store telescope with a “solar filter” – can I use that to look at the Sun?

NO! NO! NO!

 

sun_bad

These cheap “filters” are manufactured and marketed as being able to be inserted into the eyepiece. That means that by the time they get to the filter, all the Sun’s rays have gone through … Read More »



©2007-2017 Eclipse2017.org, inc. All Rights Reserved.