* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Download ppt
Perseus (constellation) wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Hubble Deep Field wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Astrophotography wikipedia , lookup
Star formation wikipedia , lookup
Observational astronomy wikipedia , lookup
Red Noise: The Bad Sources: Trends caused by changing airmass, atmospheric conditions, telescope tracking, flat field errors, fringing, etc. Usually it is combination of several factors. Time scale of these is 2-3 hours which is the same as transit timescales.. Atmospheric Extinction can affect colors of stars and photometric precision of differential photometry since observations are done at different air masses and these have a wavelength dependence Major sources of extinction: ⢠Rayleigh scattering: cross section s per molecule â lâ4