942
Tomorrow to see the eclipse and not damage your eyesight
Tomorrow, March 20 comes one of the most anticipated astronomical events in 2015 - a total solar eclipse, partial phases which can be observed in most of the CIS. This is one of those events that you should not miss. However, direct sunlight, can seriously damage the retina of the eye. So what to do?
Solar eclipse of March 20, 2015 will happen on the day of the vernal equinox. Zatmeniebudet complete, but the band is the total phase will take place away from the big cities.
In Moscow, the eclipse will begin at 12 hours 12 minutes Moscow. Maximum phase will be 0, 65, and 2:00 eclipse duration of 14 minutes. This means that most of the sun disappears behind the moon.
In St. Petersburg, the phase will amount to 0, 78 for the same duration - and the Sun will appear in the form of a sickle. Most phase, which can be observed from the territory of Russia, will be 0, 91 - in the Murmansk region on the border with Norway.
How correctly to look at the sun during an eclipse?
Look at the sun directly impossible. Even if the visibility remains a small piece of the sun, it will be enough to damage your eyes to blindness.
Not suitable and popular methods such as:
- Color films and some b / w
- Medical x-ray film with images
- Tinted glass
- Any kind of sunglasses
- CD-ROM or floppy disk
That is suitable for observation:
- On sale can be found on special glasses with full UV protection.
- In addition, one can use only black and white film, only undeveloped and only those which contain the silver layer.
- Welding glasses with protective shade no less "14»
- In stores selling photographic equipment and special photographic filters for observing eclipses
A detailed FAQ on the use of solar filters here , unfortunately only in English.
- The projector, which is made in the following way: you will need two sheets of white paper or cardboard and stud. In one sheet break through pin one hole. Another sheet set at a certain distance parallel to the first, in the opposite direction from the sun. You thus need to be back to the sun. A beam of light passes through the hole and project on the second sheet of paper in the image of the sun.
In any case you can not look at the sun through the hole. Furthermore, it is possible to make more convenient the projector from the box, paper / cardboard and foil.
Source: geektimes.ru/post/247514/
Solar eclipse of March 20, 2015 will happen on the day of the vernal equinox. Zatmeniebudet complete, but the band is the total phase will take place away from the big cities.
In Moscow, the eclipse will begin at 12 hours 12 minutes Moscow. Maximum phase will be 0, 65, and 2:00 eclipse duration of 14 minutes. This means that most of the sun disappears behind the moon.
In St. Petersburg, the phase will amount to 0, 78 for the same duration - and the Sun will appear in the form of a sickle. Most phase, which can be observed from the territory of Russia, will be 0, 91 - in the Murmansk region on the border with Norway.
How correctly to look at the sun during an eclipse?
Look at the sun directly impossible. Even if the visibility remains a small piece of the sun, it will be enough to damage your eyes to blindness.
Not suitable and popular methods such as:
- Color films and some b / w
- Medical x-ray film with images
- Tinted glass
- Any kind of sunglasses
- CD-ROM or floppy disk
That is suitable for observation:
- On sale can be found on special glasses with full UV protection.
- In addition, one can use only black and white film, only undeveloped and only those which contain the silver layer.
- Welding glasses with protective shade no less "14»
- In stores selling photographic equipment and special photographic filters for observing eclipses
A detailed FAQ on the use of solar filters here , unfortunately only in English.
- The projector, which is made in the following way: you will need two sheets of white paper or cardboard and stud. In one sheet break through pin one hole. Another sheet set at a certain distance parallel to the first, in the opposite direction from the sun. You thus need to be back to the sun. A beam of light passes through the hole and project on the second sheet of paper in the image of the sun.
In any case you can not look at the sun through the hole. Furthermore, it is possible to make more convenient the projector from the box, paper / cardboard and foil.
Source: geektimes.ru/post/247514/
"KAMAZ" with unmanned control system: everything you wanted to know but were afraid to ask
Weather on Mars: dust storms and aurora