Measuring the invisible

To commemorate this ephemeris NASE proposes to all its participants and instructors to carry out the Herschel experience. Although the day of light is May 16, it is proposed to all participants to do it throughout the year, although it is not that day because as it is well known on May 16 it falls into the rainy season in some countries For this reason it can be done with other teachers and students any day of 2018. We request that you send us some testimonial photos and the data in the table that appears in the introductory material that you have to read to prepare the experience. Good luck and have a sunny day to do it.