Archive for the ‘Night Sky’ Category

Moonstruck   Leave a comment

MoonDaguerreotype

The Moon, as photographed by Louis Daguerre, 1839

I’m not kidding when I say I’ve been moonstruck since childhood. That’s when my parents dragged me out of bed on one sultry July evening. Mom opened the bedroom door, shook me and said, “Wake up! You have to see this!” Grumpily, I dragged my sleepy self down the hall and into the living room, where my parents, grandparents, sister and brother sat, glued to the TV. My seven-year-old self stared at the screen, impatient. After a few moments, Neil Armstrong hopped out of the LM and into history, followed shortly thereafter by Buzz Aldrin.

The whole concept seemed so wild to me. That giant Saturn rocket shooting them into space. Three men jammed into what seemed not much larger than a Volkswagen Beetle. Being able to see and hear them from an ever increasing distance. And then, the landing. Walter Cronkite’s gushing on air wasn’t much different from everyone in my house. Or the world, for that matter.

I didn’t really think about all the technology, or the training, or the money, or even the space race that evening. Other NASA missions came and went, and my family followed them all. But somehow, this one stood out from the rest. Three guys achieved something no one else has ever done then and since (although that will change shortly).

All I knew was that I wanted to be an astronaut. Desperately.

As the years went by, I shifted my interests to astronomy and learning the constellations, and the shifting planets in the nighttime sky, plus the occasional comet and meteor showers. I never did well in math, so I gave up my dream of becoming an astronomer. But my love for the offworld never faded, and I kept my sweet spot for the moon.

There’s nothing more entrancing than watching the glow of a full moon on a white blanket of snow, as the whitened trees glisten from its brightness. Or how a summer night feels so romantic with the moon sailing over the ocean. How welcoming the moon can be when it peeps out from a clearing sky, or transform into a mysterious red when it eclipses. Or blots out the sun and turns black.

Lots of sci-fi novels and movies use the moon as a backdrop or a plot device. It has religious significance for many. One can be mooned, have a moonface, or eat a moon pie, or wear a moonstone. Or be like Cher and Nicholas Cage and be moonstruck.

If you’re lucky and under the right conditions, you can catch the new moon in the old moon’s arms, or the old moon’s arm around the new moon. That means right before and after a new moon, there’s a thin ribbon of light, the slenderest of crescents, holding the dark side. Through a telescope or good binoculars, you can make out some details of the dark side too. This phase doesn’t last long, as it’s right before sunrise or just after sunset, and the moon is very close to the sun in the sky and very near the horizon.

If you catch it just at the right time, you can see an occultation, or the moon appearing to hide a star or planet. It’s literally now you see it, now you don’t. The moon slides in front of a celestial body, for a matter of minutes or hours. Then the celestial body magically reappears. It’s fascinating to watch.

During daylight, a moonrise might seem as if it’s almost see-through and blue. Spotting a full moon rising from a mountaintop is downright spectacular. You’ll never see something so big in your entire life. Or catching it rising over the ocean – the glow on the horizon, then a tiny, shy peep, as it creeps higher into the sky, a ribbon of light shimmering over the ocean’s surface, until, for a moment, the entire orb appears to be balancing on the horizon itself. Way cool!

I’ve already spent much of last and this week reliving the moon landing and the entire NASA early space mission by watching programs on PBS, or reading articles, or posts on my Twitter feed. I still marvel at this accomplishment.

But most importantly, I remember how unifying this singular moment was for our planet. How we all came together to marvel at such an achievement. It was an accomplished started out of competition and ended in peace. We need, not only as a nation, but as ambassadors of this legacy, to remember what good can come of scientific achievements, and to put aside all that makes us angry and frustrated, in order to move forward to use our discoveries to better the fates of all humankind.

 

On The Cusp Of Summer   Leave a comment

Summer_Solstice_Midnight_2017

The Earth captured at summer solstice, 2017 – Credit: Japan Meteorological Agency’s Himawari-8 satellite

Ah, summer. Leisurely days spent sipping ice tea by the pool or barbecue. Or maybe a vacation on a beach or lake? Or a trip overseas? There’s just something about this favorite season of everyone’s that brings smiles and thoughts of relaxing the sultry days away, maybe indulging too much ice cream and gazing at fireworks.

Summer almost seems like a reward for shivering in winter, raking all those autumn leaves and pulling the enthusiastically growing spring weeds from all those places they shouldn’t be growing. It’s the glamour girl of the seasons, letting down its long, luxurious hair to blow in the west wind, shining brightly in the glittering sun.

But really, summer is just a spot on the Earth’s orbit that means that one of its poles has reached its maximum tilt towards the sun, and from an observer’s viewpoint, the sun has reached its highest point in the sky. And during the northern hemisphere’s summer, anyone south of the equator is entering winter. Or, if you’re at the equator, there’s hardly any shift in time or seasons.

The summer solstice occurs in the northern hemisphere anytime between June 20-22. It’s a quirk of the calendar, not of the Earth. If one also notices the time of sunrise and sunset, you’ll see that sunrise times seem stuck in place for a few days, but the sunset times grow later. The sun in the sky appears to be at the same place for a short while. That’s known as an analemma. Click on the link for a previous blog post that nicely explains what it is.

Skygazers are rewarded with lots of wonderful constellations during the summer. Facing south, both Scorpius and Sagittarius dominate the sky. There’s the Perseid meteor showers from August 8-13. The Summer Triangle too – consisting of three brilliant stars: Deneb in Cygnus, Altair in Aquila and Vega in Lyra. The Milky Way shines brightly above around midnight, and Aquila and Cygnus are poised within it.

While haze might make some nights a bit challenging for observing the sky, viewers should take every opportunity to turn off the porch light and look up. Those stars won’t be hanging around forever. They’re busy marching on to the next season, which is autumn, and in the northern hemisphere it occurs on September 23. So put down your smartphone, turn off the TV and get outside!

 

 

 

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