Ernesto Guido is an Italian amateur astronomer whose main interests lie in the astrometry and physical properties of comets.
Unless otherwise specified, the work of Guido is shared on planetary.org with all rights reserved. Do not reuse in any way without permission.Contact us
to request publication permission.
An asteroid or comet headed for Earth is the only large-scale natural disaster we can prevent. Working together to fund our Shoemaker NEO Grants for astronomers, we can help save the world.
Intro Astronomy 2017. Class 4: Moon, Mercury, Venus-Earth-Mars Atmospheres
Pretty pictures and