A total eclipse…or a partial eclipse

Solar radiation during a total solar eclipse

Total eclipse in the heart

For this new section, authors are invited to submit images of cardiovascular conditions that can be of value to our readers because the images are interesting, intriguing, rare and illustrative, thought-provoking, relevant to recent discussions or guidelines, entertaining, or all of the above. We do require them to be educational and/or of scientific interest. Except ECGs, which are captured in...

Search for neutrino radiative decays during a total solar eclipse

We present the results of the measurements performed in the occasion of the 2001 total solar eclipse, looking for visible photons emitted through a possible radiative decay of solar neutrinos. We establish lower limits for the ν2 and ν3 proper lifetimes above 10 s/eV, for neutrino masses larger than 10 eV.

Variations in the sky brightness during a lunar eclipse

A total lunar eclipse is conjectured to have influence on the physical conditions of an environmental area, particularly on the brightness of the sky. The phenomenon might also be relevant on weather parameters change on Earth, such as temperature, humidity and pressure, though a straightforward correlation is not easy to establish. This work mainly aims at measuring the brightness of the sky a...

Simulation of solar radiation during a total eclipse: a challenge for radiative transfer

A solar eclipse is a rare but spectacular natural phenomenon and furthermore it is a challenge for radiative transfer modelling. Whereas a simple one-dimensional radiative transfer model with reduced solar irradiance at the top of the atmosphere can be used to calculate the brightness during partial eclipses a much more sophisticated model is required to calculate the brightness (i.e. the diffu...