Bob Moler's Ephemeris Blog

Ephemeris for Earth Day, Monday, April 22nd.  The sun rises at 6:46.  It’ll be up for 13 hours and 50 minutes, setting at 8:36.   The moon, 3 days before full, will set at 5:17 tomorrow morning.

The earth is unique in the solar system.  Actually every planet is unique, as we’ve found out with our spacecraft that have at least flown by every planet of the solar system, and we’re two years from flying by the dwarf planet Pluto and its so far discovered 5 moons.  But the earth uniquely supports life as we know it.  It is the only one.  While it is imperative that we colonize the moon, Mars and asteroids and live off the land so no single disaster can wipe us out, we need to take care of the earth, to understand and get a grip on what we’re doing to earth’s climate.  We must think of the earth as a spaceship with both renewable resources and limited ones.  Our journey is long, the supplies will have to last.

Times are for the Traverse City/Interlochen area of Michigan.  They may be different for your location.

Addendum

Our home. Credit NASA.