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That glow over the unlit part of a crescent moon – called earthshine – is light reflected from Earth.
Sun pillars, or light pillars, are shafts of light extending from the sun or other bright light source. They’re caused by ice crystals drifting in Earth’s air.
What are the Ides of March? We in modern times probably wouldn’t know, if it weren’t for William Shakespeare.
A star’s luminosity is its true brightness. Nearly every star you see with the unaided eye is more luminous than our sun.
It’s sometimes said that, on a worldwide scale, solar eclipses outnumber lunar eclipses by about a three to two margin. True?
This year, in 2016, there are 12 full moons and 13 new moons, but only four eclipses – two solar and two lunar.
People used to think that strong winds – which can reach 90 mph in the Death Valley desert – caused the rocks to move. In fact, that’s not what happens.
… And why does it move forward?
First time we can see 5 planets at once since 2005. All 5 are up before dawn, still, and all 5 will remain visible until Mercury disappears in the dawn just after mid-February.
Depending on the temperature and humidity of the air where the snowflakes form, the resulting ice crystals will grow into a myriad of different shapes.
Watch for Venus after sunset
Have you seen Venus?