“HDR” stands for “high dynamic range,” a photo editing technique used to combat the increased contrast that all standard photo methods are prone to – see a greater explanation here. Sometimes it’s used to produce unrealistic images with light levels that really
Category: Astronomy
Moon of steel
Yeah, it was a non-event, even in areas that had good visibility – mass media really can’t handle astronomical events very well, but much worse is the social-media-fueled rumor mill. “Mars will be so close it will appear to be the size of Jupiter in the sky!” yeah, yeah…
Now, a curiosity. The haze is from the moon shining through scattered thin clouds, but the stepped
The dude is hot. Or cold. So, so cold…
A few years back when I was still following the Bad Astronomy blog, Phil Plait posted an image of odd geological features on Mars, along
Too cool, part 18: Hubble turns 23
Twenty-three years ago today, the Hubble Space Telescope was launched into low-earth orbit (meaning about 555 km, or 345 mi, above the surface of the Earth.) Since that time, it has produced perhaps the largest body of work of any single telescope, and certainly some of the most detailed. And just recently, NASA released a sweetheart.
Let’s start with some perspective. Everyone (who matters)
Not the right kind of composition
Just a quick image from tonight, as Jupiter passed close to the moon. Or at least, from the given perspective of one position in the universe presently occupied by Earth. Jupiter has often been much closer to the moon, distance-wise, even when not visible in the sky at all.
This is admittedly both not very good, and a digital composite. The reason for the composite is the wide disparity in light
Chasing megapixels
Some time back, I’d started a post on this subject, partially in response to a thread somewhere, but when I took too long to finish it I realized it was, in webby terms, no longer current, and simply let it go. But after another prompting, this time from The Straight Dope, I decided it’s worth pursuing anyway, and may provide a little insight into the whole digital photography thing.
Just a bit of trivia
The passing of Neil Armstrong the other day brought a flurry of articles and post featuring the same image, one that’s been featured literally uncountable times since 1969. You know the one that I mean…
Those that are really into the space programs, especially the Apollos, know that this is usually misrepresented. This is not the first footprint on the moon. No, it’s not the first
Curiosity
As I sit here watching, more or less live, all the guys at JPL as the Mars Science Laboratory (otherwise known as “Curiosity”) prepares to land on Mars, I’m wandering off in speculation about humans as a species and our own curiosity, the trait that makes us do things exactly like this.
[The vehicle is being drawn by Mars gravity and is on its way up to 5.9 kilometers per second,
Unprecedented
Yeah, despite my kvetching, I actually got some breaks in the clouds during the transit of Venus right now, and the thin wisps allowing the sun to peek through actually made the light level manageable without a ridiculously expensive solar filter (that I would use once.)
During the previous transit in 2004, I was living in Florida and had a basic Galilean telescope that might have produced some nice
Showoff
So yeah, I’m well outside of the range of the annular eclipse, still taking place as I type this I believe, and my friend in Kansas thought he was too. But at least he was watching carefully at sunset when he got the right conditions.
No filters needed when it’s this low on the horizon, since the atmosphere cuts the light levels down to manageable levels. Notice