The Delaware Gazette

Johannes Hevelius, my daughter, a tea tray

My 60th birth­day just passed, and it made me think, oddly, of my daugh­ter, a little-known con­stel­la­tion, an even more obscure astronomer and a tea tray. Canes Venatici may be an obscure con­stel­la­tion, but it pro­duces in me (in a con­vo­luted way, as you shall see) an intensely reli­gious frame of mind. Every time I look at it, I think of a time two decades ago, when my then four-year-old daugh­ter res­cued me from a ter­ri­ble fate.

A moving experience

In my mis­spent youth, I had an expe­ri­ence that pro­foundly changed me and, in fact, accounts for the fact that I have been doing pub­lic work in astron­omy for almost half a century.

How far away is the moon?

When the grade school­ers show up at Perkins Obser­va­tory, they invari­ably ask, “How far away is that.” Since 650 bil­lion miles doesn’t make a whole lot of sense to them (or me, quite frankly), the temp­ta­tion is to say, “Really, really far away.”

Spectral lines

About 98 per­cent of the cos­mos is com­posed of the two sim­plest ele­ments, hydro­gen and helium, mostly in the form of giant gas clouds and stars.

Saturn’s rings

Sat­urn sits high in the south right now. The best time to look is around 11 p.m. when the planet is high­est in the sky and less affected by the tur­bu­lent motion of Earth’s atmos­phere. Look for a pale yel­low point of light much brighter than any of the fainter stars that sur­round it.

Saturn and Galileo

Sat­urn has returned to our cen­tral Ohio sky at last. No astro­nom­i­cal sight is more breath­tak­ing, even in a small tele­scope, than Saturn’s celes­tial hat brim. Around 10 p.m., look for the ringed planet low in the south­east­ern sky as a yel­low point of light.

The Heart of Charles

Astron­omy rarely imposes its polit­i­cal beliefs on the stars. Most stars have alphanu­mer­i­cal des­ig­na­tions, not names. The goal is to be objec­tive. The uni­verse is mute to human social prob­lems and history.

Springtime stars

This week, let’s dip into the email bag and see what we find.

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