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Hubble will see the Venus Transit

On June 5, 2012, Venus will pass in front of the Sun. This transit will follow numerous amateurs and professionals around the world, but it is interesting that HST will also participate in this! But how will they do it since Hubble cannot see directly the Sun? They will use instead a “mirror” and this […]

About full Moon and Moon illusion

The size of a Full Moon depends on the position of the Moon in its orbit (~ 0.5 degrees). Thus the biggest Full Moon is when the Moon is closest to Earth (i.e. at perigee). from spaceweather.com (28 Jan 2010) “… a “perigee Moon” some 14% wider and 30% brighter than lesser full Moons of […]

Moon (Lunar) phases

Just a quick note for moon (or lunar) phases. From Wikipedia / Lunar Phases (moon phases). Phase Northern Hemisphere Southern Hemisphere Visibility New moon Not visible, traditionally Moon’s first visible crescent after sunset Waxing crescent moon . Right 1-49% visible Left 1-49% visible afternoon and post-dusk First quarter moon Right 50% visible Left 50% visible […]