Followup: City lights from space

The entire universe in blog form
May 18 2011 7:00 AM

Followup: City lights from space

Last week, I posted a picture taken by International Space Station astronaut Ron Garan, showing city lights at night. I was curious about what the cities were, and initially had a hard time figuring it out. But, using various tools -- Wolfram Alpha to get the ISS position at the time the photo was taken, an atlas, and a rough direction and scale using the visibility of Orion's belt in the picture -- I took a stab at which cities were which.

A followup on that post is in order. A lot of people left comments on the post, and some went through similar sleuthing exercises as I did. Quite a few agree with my assessment: the city in the center of the picture is Warsaw, Poland. Berlin is on the horizon, and other cities are as I determined.

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!  


I used an old-fashioned atlas to find the cities because I couldn't find a good piece of software to do it. But then I had a facepalmy moment when several people suggested Google Earth! I got a new computer when my Mac died a little while ago, and never installed GE on it. So I downloaded and started fiddling with it, and sure enough the cities do seem to match. If you're curious, go to latitude 50.56 North, longitude 38.23 East, zoom out to an eye altitude of about 221 miles, and rotate the picture so you're facing west.

At this point, you'll see a big city centered in the frame that turns out to be Kiev, Ukraine. That threw me for a second, but I remembered that given Orion's size in the ISS photo in question, it's clear the picture is zoomed in a bit. Kiev is off the bottom of the frame. Also, in Google Earth, you can overlay the landscape with a NASA picture of cities at night (in Layers, go to Gallery then NASA then Cities at Night). Zoom in so that Warsaw is centered, and the other cities do indeed appear to line up with my initial guess.

So hey, I was right! Richard Drumm, an astronomer who lives in my old stomping grounds in Virginia, kindly annotated an image to show what's what. You can find more in the comments of the original post.

And I'm honored to have discovered that Ron Garan, the astronaut who took the picture, tweeted about my post as well!

All in all, this was a fun and interesting exercise. It gave me an appreciation for what cartographers do, and also how hard it must be for astronauts to figure out where they are over the Earth. Imagine waking up, looking outside your window, and having no clue at all even what part of the Earth you're seeing! Before teh internetz, I used to spend a lot of time trying to do something like this when I was identifying stars in photographs. When I first looked at Ron's picture I figured it would be easier looking down, but I was wrong.

It also was rewarding in a more literal sense, in that I got to find Google Earth all over again, and see that Wolfram Alpha is a pretty useful site. Next time I have a weird question, I'll have to try there first.

And, of course, the most important lesson here is that playing is fun, even when it's nerdy and maybe seems at first like a time sink. In a lot of cases, playing leads to learning, and there's always room for that... and there's always much, much more to learn.



Don’t Expect Adrian Peterson to Go to Prison

In much of America, beating your children is perfectly legal. 

Ken Burns on Why Teddy Roosevelt Would Never Get Elected in 2014

Cops Briefly Detain Django Unchained Actress Because They Thought She Was a Prostitute

Minimalist Cocktail Posters Make Mixing Drinks a Cinch

How the Apple Watch Will Annoy Us

A glowing screen attached to someone else’s wrist is shinier than all but the blingiest of jewels.


Rainbow Parties and Sex Bracelets

Where teenage sex rumors come from—and why they’re bad for parents and kids.


You Had to Be There

What we can learn from things that used to be funny.

Legendary Critic Greil Marcus Measures and Maps Rock History Through 10 Unlikely Songs

Catfish Creator Nev Schulman’s Book Is Just Like Him: Self-Deluded and Completely Infectious

Sept. 12 2014 5:54 PM An Up-Close Look at the U.S.–Mexico Border
  News & Politics
Sept. 14 2014 2:37 PM When Abuse Is Not Abuse Don’t expect Adrian Peterson to go to prison. In much of America, beating your kids is perfectly legal. 
Sept. 12 2014 5:54 PM Olive Garden Has Been Committing a Culinary Crime Against Humanity
Inside Higher Ed
Sept. 13 2014 8:38 AM “You’re More Than Just a Number” Goucher College goes transcript-free in admissions.
  Double X
The XX Factor
Sept. 12 2014 4:05 PM Life as an NFL Wife: “He's the Star. Keep Him Happy.”
  Slate Plus
Behind the Scenes
Sept. 12 2014 5:55 PM “Do You Know What Porn Is?” Conversations with Dahlia Lithwick’s 11-year-old son.
Brow Beat
Sept. 14 2014 7:10 PM Watch Michael Winslow Perform Every Part of “Whole Lotta Love” With Just His Voice
Future Tense
Sept. 12 2014 3:53 PM We Need to Pass Legislation on Artificial Intelligence Early and Often
  Health & Science
New Scientist
Sept. 14 2014 8:38 AM Scientific Misconduct Should Be a Crime It’s as bad as fraud or theft, only potentially more dangerous.
Sports Nut
Sept. 12 2014 4:36 PM “There’s No Tolerance for That” Pete Carroll and Jim Harbaugh say they don’t abide domestic abuse. So why do the Seahawks and 49ers have a combined six players accused of violence against women?