Astrophotos: Red Rock, Black Spider, Blue Moon

The entire universe in blog form
Aug. 27 2013 10:15 AM

Red Rock, Black Spider, Blue Moon

Uluru and the Moon
The allure of Uluru and the Moon. Click to downunderenate, and you want to.

Photo by Storm DiCostanzo, used by permission

Your word of the day is lunation.

Phil Plait Phil Plait

Phil Plait writes Slate’s Bad Astronomy blog and is an astronomer, public speaker, science evangelizer, and author of Death From the Skies!  

This is the term given to a single cycle of the phases of the Moon, from new to full and back to new again. A lunation is about 29.5 days (think “moonth” if that helps). Each lunation is given a unique number—there are various systems, but the most common starts with the cycle that began in January 1923. In that case, as I write this, we’re in Lunation 1121.

Advertisement

This last full Moon was interesting. Some people were calling it a Blue Moon, which made me chuckle: The term has no scientific meaning but has a cultural one of being the second full Moon that occurs in a calendar month. However, that can’t be true in this case, since the full Moon was just after midnight on the evening of Aug. 20-21. If it takes nearly 30 days to go through a set of phases, the Blue Moon has to happen on the last couple of days of the month.

Some people say a Blue Moon is the fourth full Moon in a season, but even that is more folklore than anything else. The term really just means something very rare and was later adopted to pertain to the actual phase of the Moon. And it has nothing whatsoever to do with the color of the Moon. So there.

Still, because of the buzz, a lot of folks went out to look at the Moon (I tweeted about it, too—twice actually, the second one being a joke). A lot of people sent me pictures of it, and a couple from this current lunation were cool enough that I wanted to share.

The first (shown above) comes from my friend Storm DiCostanzo, aka “and Storm”, one half of the musical geek duo Paul and Storm. He and his wife happened to be in Australia at the same time I was recently, and we got together to spend an afternoon in Sydney. They told me they were going to Uluru, aka Ayers Rock, and I was jealous; I’ve always wanted to visit. But that jealousy increased hugely when I saw the amazing shot Storm took.

Uluru is a several-hundred-million-year-old sandstone inselberg (island rock) in central Australia. It’s difficult to get to and is incredibly isolated from cities. The skies there get substantially dark, though the nearly full Moon would bleach out the stars. Still, if it means getting a photo like Storm’s, then maybe that’s worth it.

The second shot is a bit more whimsical and was sent to me by Steve Marr (arachnophobes, you may want to skip this one):

spider and the Moon
This spider may've bitten off more than it can chew. [Alt.: We're gonna need a bigger web.]

Photo by Steve Marr, used by permission

This is actually what’s called a high-dynamic range or HDR picture. When you take a picture with your camera, it sees light linearly; that is, something twice as bright looks twice as bright in the picture. Our eyes don’t really see that way, though. It’s complicated, but overall we see logarithmically: Something twice as bright might only appear fractionally brighter to our eye. That’s why most pictures overexpose so quickly while our eyes see the same scene just fine.

HDR photography compensates for this a bit. The camera takes three exposures—one short, one medium, and one long—to be able to see bright, medium, and faint highlights. It then combines them into one shot that more closely mimics what the eye can see.

That’s what Marr did for this lunar arachnophilic picture. It also gives the picture a slightly creepier edge to it—like it really needs it.

We see the Moon almost every day, sometimes at night, sometimes during the day, sometimes full, sometimes new, and with every phase in between. It’s always changing, always different, and always lovely to behold. If you can, go take a look.

TODAY IN SLATE

Politics

Blacks Don’t Have a Corporal Punishment Problem

Americans do. But when blacks exhibit the same behaviors as others, it becomes part of a greater black pathology. 

I Bought the Huge iPhone. I’m Already Thinking of Returning It.

Scotland Is Just the Beginning. Expect More Political Earthquakes in Europe.

Lifetime Didn’t Think the Steubenville Rape Case Was Dramatic Enough

So they added a little self-immolation.

Two Damn Good, Very Different Movies About Soldiers Returning From War

Medical Examiner

The Most Terrifying Thing About Ebola 

The disease threatens humanity by preying on humanity.

Students Aren’t Going to College Football Games as Much Anymore, and Schools Are Getting Worried

The Good Wife Is Cynical, Thrilling, and Grown-Up. It’s Also TV’s Best Drama.

  News & Politics
Weigel
Sept. 20 2014 11:13 AM -30-
  Business
Business Insider
Sept. 20 2014 6:30 AM The Man Making Bill Gates Richer
  Life
Quora
Sept. 20 2014 7:27 AM How Do Plants Grow Aboard the International Space Station?
  Double X
The XX Factor
Sept. 19 2014 4:58 PM Steubenville Gets the Lifetime Treatment (And a Cheerleader Erupts Into Flames)
  Slate Plus
Slate Picks
Sept. 19 2014 12:00 PM What Happened at Slate This Week? The Slatest editor tells us to read well-informed skepticism, media criticism, and more.
  Arts
Brow Beat
Sept. 20 2014 3:21 PM “The More You Know (About Black People)” Uses Very Funny PSAs to Condemn Black Stereotypes
  Technology
Future Tense
Sept. 19 2014 6:31 PM The One Big Problem With the Enormous New iPhone
  Health & Science
Bad Astronomy
Sept. 20 2014 7:00 AM The Shaggy Sun
  Sports
Sports Nut
Sept. 18 2014 11:42 AM Grandmaster Clash One of the most amazing feats in chess history just happened, and no one noticed.