Cool astronomy photos

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Rob Lister
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Re: Cool astronomy photos

Post by Rob Lister »

First, I know practically zero about cameras. Some education would be nice. But not too much! I'll end up buying something stupid if I get too smart.
Witness wrote:
Fri Mar 20, 2020 3:37 am
NASA's Curiosity Mars Rover Snaps Its Highest-Resolution Panorama Yet

NASA's Curiosity rover has captured its highest-resolution panorama yet of the Martian surface. Composed of more than 1,000 images taken during the 2019 Thanksgiving holiday and carefully assembled over the ensuing months, the composite contains 1.8 billion pixels of Martian landscape.
That works out to 18 megapixels per shot, naively

I presume that was taken by the Mastcam
https://mars.nasa.gov/msl/spacecraft/in ... s/mastcam/
Specs state it has a resolution of 1600x1200, which in turn equates to only 1.9 megapixels.
How did they turn 1.9 into 18?

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Anaxagoras
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Re: Cool astronomy photos

Post by Anaxagoras »

Rob Lister wrote:
Fri Mar 20, 2020 9:55 am
First, I know practically zero about cameras. Some education would be nice. But not too much! I'll end up buying something stupid if I get too smart.
Witness wrote:
Fri Mar 20, 2020 3:37 am
NASA's Curiosity Mars Rover Snaps Its Highest-Resolution Panorama Yet

NASA's Curiosity rover has captured its highest-resolution panorama yet of the Martian surface. Composed of more than 1,000 images taken during the 2019 Thanksgiving holiday and carefully assembled over the ensuing months, the composite contains 1.8 billion pixels of Martian landscape.
That works out to 18 megapixels per shot, naively

I presume that was taken by the Mastcam
https://mars.nasa.gov/msl/spacecraft/in ... s/mastcam/
Specs state it has a resolution of 1600x1200, which in turn equates to only 1.9 megapixels.
How did they turn 1.9 into 18?
1.8 billion divided by 1,000 images is about 1.8 million pixels per image, I think. I think you missed a zero somewhere.
A fool thinks himself to be wise, but a wise man knows himself to be a fool.
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Rob Lister
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Re: Cool astronomy photos

Post by Rob Lister »

Fucking decimals. They should at least be bigger.

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Witness
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Re: Cool astronomy photos

Post by Witness »

Rob Lister wrote:
Fri Mar 20, 2020 9:55 am
First, I know practically zero about cameras. Some education would be nice. But not too much! I'll end up buying something stupid if I get too smart.
A lot of cameras nowadays can do panoramas internally: you launch the process and just swipe the field of view you want. In my experience it doesn't work too well. So you do it by hand, taking overlapping pictures (~ 30 %) to assemble afterwards on your computer.
Microsoft has an excellent freeware (gasp! a Microsft freeware!) for that: Image Composite Editor.

If you're really into panoramas you'll use a motorized tripod to get the overlaps automatically. (They aren't yet at the point where you just can tell them "go take some pictures of…")

You want to buy a camera?

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Anaxagoras
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Re: Cool astronomy photos

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A fool thinks himself to be wise, but a wise man knows himself to be a fool.
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Re: Cool astronomy photos

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Democrats want to abort that nebula.

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Witness
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Re: Cool astronomy photos

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Comet ATLAS may soon be visible to the naked eye

C/2019 Y4 (ATLAS) is racing toward the Sun — and possibly a place in the history books.

Image

Right now, odds are that Comet C/2019 Y4 (ATLAS) will be wonderful. Just maybe it will be the most amazing thing you will ever see — a great comet for the history books. Here’s what we might be able to expect.

Y4 was discovered on December 29, 2019, by the Asteroid Terrestrial-impact Last Alert System (ATLAS) search program, one of the several automated sky surveys looking for potential Earth-crossing asteroids. Discovering comets is essentially a byproduct of this endeavor. At the time, C/2019 Y4 was a feeble magnitude 19.6 and located at nearly 3 astronomical units from the Sun — almost twice as far from our star as Mars. (One astronomical unit, or AU, is the average Earth-Sun distance.)

In mid-March, Y4 ATLAS surged 4 magnitudes, fueling rumors that it will just keep getting brighter, peaking at magnitude –8. But back in 2000, C/1999 S4 (LINEAR) dropped the same amount on its approach and dissolved rapidly.

David Levy wrote that “Comets are like cats. They have tails and they do whatever they want.” Despite the best observations and understanding, these dirty snowballs can fizzle out with no notice even farther from the Sun than Mars’ orbit, a distance Y4 ATLAS reaches at April’s start.

The description here covers what we’re likely to witness: a fantastic display like Comet C/1975 V1 West delivered in 1976. Stay hopeful for the comet of a generation and realize that, at worst, it will still be a nice binocular object.

Image
Between the end of March and the middle of June, ATLAS will slip through several familiar constellations and come close to some easily identifiable bright stars, including Capella, Aldebaran, and Betelgeuse.
https://astronomy.com/news/observing/20 ... -naked-eye

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Witness
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Re: Cool astronomy photos

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Witness
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Re: Cool astronomy photos

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You'll have to click: https://vreddit.cc/bw149fco1ap41

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Anaxagoras
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Re: Cool astronomy photos

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A fool thinks himself to be wise, but a wise man knows himself to be a fool.
William Shakespeare

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Re: Cool astronomy photos

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Witness wrote:
Tue Mar 31, 2020 9:45 pm
You'll have to click: https://vreddit.cc/bw149fco1ap41
Boy howdy, when they dive me buddy to the Pacific grave yard I want pictures, porn, de-orbital satellite stuff the likes of which may never be seen again. If any spacecraft's demise should be documented it's Hubble. The tech exists. The balls exist. We await.
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Witness
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Re: Cool astronomy photos

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Bruce
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Re: Cool astronomy photos

Post by Bruce »

Dragon fight on Jupiter.

Image
Such potential!

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Anaxagoras
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Re: Cool astronomy photos

Post by Anaxagoras »

I wonder if they ever figured out how to explain Jupiter's red spot.

Did a large object like a comet or an asteroid collide with Jupiter there, thus causing a storm?

Or maybe the solid core of Jupiter has a tall mountain there?

What is different about that one spot?
A fool thinks himself to be wise, but a wise man knows himself to be a fool.
William Shakespeare