What colors are invisible to humans?

We see our world in a huge variety of colour. However, there are other “colours” that our eyes can't see, beyond red and violet, they are: infrared and ultraviolet. Comparing these pictures, taken in these three “types of light”, the rainbow appears to extend far beyond the visible light.

cesar.esa.int - The invisible colours of space - CESAR / ESA

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The invisible colours of space

3 ESO (14-15 years old)

In this experience, explore the large portion of the spectrum of light that is invisible to human eyes, discover the information it contains, and a new view of the cosmos....

Material that could add value if prepared before coming to ESAC:

Thermal Energy: Heat and temperature.

Videos

Material to be used at ESAC: Scientific Case and Game.

Multispectral rainbow. Courtesy of Dr. A. Dominic Fortes, Earth Sciences

In addition to ultraviolet and infrared, there are other “colours” which are hidden from sight. The whole set of “colours” is called the electromagnetic spectrum, which is divided into different ranges. In order, from the highest to the lowest energy, they are: gamma rays, X rays, ultraviolet, visible light, infrared, microwaves, radiowaves.

Electromagnetic spectrum. Source: Wikipedia.org

To see the cosmos in light beyond the visible part of the spectrum, special instruments are needed, with different types of detectors depending on the wavelength. These instruments/detectors, allow astronomers to obtain a huge amount of information about the Universe.

Galaxy observed at different wavelengths. Credit: http://www.caosyciencia.com/img/img310712.jpg

In this Space Science Experience, students will match images of astronomical objects to the corresponding wavelength. Nowadays, the European Space Agency has a fleet of satellites that observe the Universe in all the ranges of the electromagnetic spectrum. This is to enable astronomers to obtain a complete picture of the different process that take place around astronomical objects.

ESA'S fleet across the spectrum. Credit: ESA

Let's go study the sky in all these “colours”!

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Can you wear glasses as a sniper?

*If you wear glasses, bring 2 pair of military issue of current prescription. Contacts and civilian eyewear are authorized. *You will use sunscreen and insect repellent, bring it.

benning.army.mil - Additional Information - Fort Benning | United States Army Sniper Course

United States Army Sniper Course Site

United States Army Sniper Course

Sniper School Milsuite

https://www.milsuite.mil/book/groups/us-army-sniper-school

The Milsuite will have the most up-to-date information

FINAL NOTES: *Students will wear boonie hats during training. If students leave the USASS Compound in uniform, they are required to wear their uniform IAW AR 670-1 to include the Beret. *If you wear glasses, bring 2 pair of military issue of current prescription. Contacts and civilian eyewear are authorized.

*You will use sunscreen and insect repellent, bring it.

*You may bring Cell phones and Laptops for use AFTER TRAINING HOURS.

*Students must complete Ghillie Suit IAW USASS before reporting. Students may use any style uniform as the base for their Ghillie Suit. COTS (commercial off the shelf) Ghillie suits and items are authorized.

*NO Privately Owned Weapons

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