Sunday, July 29, 2018

Sunday, July 22, 2018

f-stop: Sharing The Skies


The 8-day-old Gibbous Moon

Another very nice evening of "sidewalking" on the shore at Marathi; I had two dozen members-of-the-public join me to explore Luna, Jupiter, Saturn and double star Albireo. The little Mak is getting quite a work-out on this deployment, but the time for a rest is not yet here--we have the lunar eclipse coming up on the evening of the 27th, after all!

This, for me, is what it's all about. I don't go to the effort of toting a telescope on these cruises in hopes of carrying-out observations of galaxies or comets. (There is usually far too much light pollution in port areas and cities I visit for "serious" observing) I bring the optics along in order to share the planets and Moon with people I meet along the way.

This is a large part of my enjoyment and love of astronomy; the act of introducing strangers to the greater Universe around them is just as powerful and rewarding an experience as exploring the skies alone. I like--need--to share this sense of wonder with others. Call it Tom's addiction.

Photo: crewmembers from Spanish frigate 'Numancia'--our neighbors on the next pier over--join me to enjoy the satellites and cloud bands of Jupiter. Next stop--Saturn!

'Jupiter' es 'Yupiter' en EspaƱola!








Monday, July 16, 2018

f-stop: Moon Over Marathi

Moon, Venus, Regulus and Rho Leonis
A shot from last night; the 2d16h-old Moon (its "dark" face dimly illuminated by sunlight reflected off Earth), bright planet Venus, and two of the brighter stars in the constellation Leo, the blue spark of 1st-Magnitude star Regulus (a Leonis) to the lower left of Luna and the dimmer point of light that is Rho Leonis below Venus.

I love views and images like this one because of the sense of perspective they evoke; at the time I took this photo our natural satellite was 225,000 miles from Earth (1.2 light-second), Venus 87,000,000 miles away (nearly 8 light-minutes). In contrast, Regulus is estimated to be 79 light-years from our solar system, while Rho Leonis is far more remote at approximately 5,000 light-years.

Imagine the distances involved--we are looking back through time; photons streaming across enormous distances to be collected by my eye and camera lens--5 millennia captured in a single snapshot taken on a beach in Marathi, Crete.


 
Another photo of the Moon from last night. I love observing and photographing our largest natural satellite (apparently Earth picks up wandering rocks as "temp" moons every once in a while), and I'm surprised by the amount of identifiable detail one can see on even a hastily-composed snapshot of her disk. I made up a "key" to a few of the features to be seen on last night's image: how many can you pick out?

 

Saturday, July 14, 2018

f-stop: Young Moon

The 1d15h23m-old Moon over Souda, Crete
On my way back to the ship at twilight...a sudden rift in the clouds revealed the 1day15hr-old Moon only a few minutes from setting. I managed a brace of hand-held shots before Luna was again lost in the clouds.

One thing that never ceases to amaze me is that one can actually make out detail on a slender crescent like tonight's apparition. In the zoomed-in shot, look for the rounded edge of Mare Crisium (Sea of Crisis) at 3-o'clock, and the small indentation in the terminator that marks the crater Humbolt at about 5-o'clock on the lunar disk.
A hand-held zoom shot--note Mare Crisium and Crater Humbolt
In a few days these details will be lost in the crowd of features and details as our satellite teasingly reveals her face. Stay tuned.

Sunday, July 1, 2018

My Favorite Spaceship

"We Have Ignition"
I entered the world in July of 1962, just over fourteen months after Yuri Gagarin of the Soviet Union had become the first human being in space, hotly pursued by American Alan Shepard a few weeks later and then John Glenn's orbital flight five months before my birth. As I developed from infant to toddler the progression of space achievements taking place high above my young head accelerated; by the time I was two years old twelve astronauts and cosmonauts had flown, the latest--Valentina Tereshkova--becoming the first woman to ride a rocket beyond the atmosphere.

Admittedly I was unconscious of all of this astronautic activity; I was far more interested in crawling and taking my first steps than in interplanetary adventure. The first extra-vehicular activity, or space-walk, took place three months before my third birthday. Affairs beyond the clouds simply weren't on my radar at this point in my life, though they soon would be.

Nostalgia is a funny thing. We find ourselves idolizing those who came and went before, seeing an automobile from our father's time as superior to our own and the songs from our childhoods as a sort of epitome against which modern compositions simply fail to measure up. It isn't rational to adore "Gone With The Wind" or "Star Trek" but we do it nonetheless; I'm sure there are volumes of psychological speculation on this topic but I think we can sum nostalgia up as a belief that somehow, someway, things were better in the past.
The Gemini Two-Man Spacecraft
My own nostalgic obsession, the space vehicle of my fancy, flew its missions and retired from the field long before my developing mind became deeply interested (some members of my family might venture to say "obsessed") in space exploration; I was using a red crayon to deface the "D" volume of my family's World Book Encyclopedia during the ten manned Gemini missions of 1965-66.

And yet, Gemini was and remains my favorite manned spacecraft. I read everything I can get my hands on--including dry-as-dust technical pieces on Titan II booster modifications and Rogallo Wings--and build model after model of the capsule and adapter module. I would speculate that, during the build-up to Apollo,  I was often exposed to the image of Edward White's historic EVA (March, 1965) and video of Gemini-Titan launches on TV. Perhaps I fell in love with this vehicle simply because of its sleek, powerful appearance--the "sports car" of manned spacecraft!
Astronauts James Lovell and Edwin "Buzz" Aldrin, Gemini XII Crew
So, what WAS Gemini? It was the vehicle we used in the mid-sixties to test all of those concepts and techniques that would be required to reach the Moon. Originally named "Mercury Mk II", it was the logical follow-on to the pioneering Mercury capsule; a two-man craft, able to maneuver in vacuum and to conduct rendezvous and docking trials using Agena target vehicles. And Gemini had much greater endurance than Mercury as well, conducting long missions on orbit (up to fourteen days in the case of Gemini VII, which also performed a rendezvous in space with Gemini VI in December 1965).
Gemini VI and VII Rendezvous On Orbit
In two years of manned missions, the astronauts of Gemini (many of whom would go on to the Moon in Apollo) proved the technology and methodology of long-duration flights in space, but it wasn't easy OR safe; they had their share of close shaves and glitches, equipment faults and near-disasters. But these were all experienced pilots who had trained hard for their missions, and in every crisis on every mission they persevered and came home that much wiser for their adventures.

Project Gemini ended with the completion of NASA's planned missions in November 1966--but it might have gone on. The USAF ran a parallel program known as "Blue Gemini", intended to support the Manned Orbiting Laboratory (MOL) which would have been America's first space station in the late sixties, but the programs were cancelled due to the cost of the Vietnam War and the perception that NASA and the Air Force were duplicating their efforts.
Journey's End
Planned missions completed and goals met, Gemini was all-but-forgotten in the rush to the Moon. Left behind by history, today few seem to remember that outer-space corvette, with its striking shape and impressive operational record. The Gemini spacecraft, the men who flew it, and the thousands of men and women who built, tested, serviced and otherwise supported the program, served as a crucial stepping-stone to the Moon; a vital link between Mercury and Apollo.
 
So...dreams of a spacecraft that flew before I was old enough to understand it or its missions; I watch the old NASA videos ("GEMINI: The next Step"), read the reports and imagine the experience of Edward White during that first American EVA. I share his emotions as well as anyone can over fifty years after the fact: when Mission Control ordered him (not for the first time) to return to the cramped cockpit of Gemini IV he grumbled "and it's the saddest moment of my life" as he reluctantly complied.
 
Yes, the Gemini missions lie five decades in the past, and even some NASA personnel I have talked to don't know about these space flights that bridged the gaps in our knowledge of the space environment and how to live and work in it. Gemini was more than just the intermediate step between Mercury and Apollo--it was the vital link in that chain of events that took us from Alan Shepard's 15-minute suborbital flight in 'Freedom 7' to 'Eagle's triumphant landing in the Sea of Tranquility and beyond. The Gemini spacecraft and the brave men who flew it should be remembered, not just by a few space "geeks" like myself but by anyone interested in knowing how we got from there to here.

I suppose spaceships need love too.