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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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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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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Re: Cool astronomy photos

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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.
... The stars were suns, but so far away they were just little points of light ... The scale of the universe suddenly opened up to me. It was a kind of religious experience. There was a magnificence to it, a grandeur, a scale which has never left me. Never ever left me.
Carl Sagan

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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.
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Doctor X
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Re: Cool astronomy photos

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Anaxagoras wrote:
Sun Apr 05, 2020 10:47 am
What is different about that one spot?
*snicker! snicker!*

– J.D.
Mob of the Mean: Free beanie, cattle-prod and Charley Fan Club!
"Doctor X is just treating you the way he treats everyone--as subhuman crap too dumb to breathe in after you breathe out." – Don
DocX: FTW. – sparks
"Doctor X wins again." – Pyrrho
"Never sorry to make a racist Fucktard cry." – His Humble MagNIfIcence
"It was the criticisms of Doc X, actually, that let me see more clearly how far the hypocrisy had gone." – clarsct
"I'd leave it up to Doctor X who has been a benevolent tyrant so far." – Grammatron
"Indeed you are a river to your people.
Shit. That's going to end up in your sig." – Pyrrho
"Try a twelve step program and accept Doctor X as your High Power." – asthmatic camel
"just like Doc X said." – gnome

ImageWS CHAMPIONS X4!!!! ImageNBA CHAMPIONS!! Stanley Cup!Image SB CHAMPIONS X6!!!!!! Image

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Rob Lister
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Re: Cool astronomy photos

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"tee hee"

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Witness
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Re: Cool astronomy photos

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Image
Hubble Spots Jupiter’s Great Red Spot

This new Hubble Space Telescope view of Jupiter, taken on June 27, 2019, reveals the giant planet's trademark Great Red Spot, and a more intense color palette in the clouds swirling in Jupiter's turbulent atmosphere than seen in previous years. The colors, and their changes, provide important clues to ongoing processes in Jupiter's atmosphere.

The bands are created by differences in the thickness and height of the ammonia ice clouds. The colorful bands, which flow in opposite directions at various latitudes, result from different atmospheric pressures. Lighter bands rise higher and have thicker clouds than the darker bands.

The new image was taken in visible light as part of the Outer Planets Atmospheres Legacy program, or OPAL. The program provides yearly Hubble global views of the outer planets to look for changes in their storms, winds and clouds. Hubble's Wide Field Camera 3 observed Jupiter when the planet was 400 million miles from Earth, when Jupiter was near "opposition" or almost directly opposite the Sun in the sky.
https://www.nasa.gov/image-feature/hubb ... t-red-spot

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Re: Cool astronomy photos

Post by robinson »

oh really?

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Witness
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Re: Cool astronomy photos

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A starry night in the Pillars of Creation

Image

Located about 7,000 light-years away in the Eagle Nebula (M16), the so-called Pillars of Creation is one of the many wonders of the cosmos. There’s almost something humbling about seeing photos of it, no matter what wavelength of light is used.

The Hubble Space Telescope has been taking stunning photos of the Pillars of Creation since 1995, when it first captured its iconic visible-light image. The above image, however, was taken in infrared light, which results in this shadowy view of the pillars. Because infrared light easily cuts through cosmic dust and gas, the stars in this unique view shine brighter, and the pillars themselves appear as ghostly silhouettes against a dark blue haze.

The Pillars of Creation were first discovered in 1745 by Swiss astronomer Jean-Philippe Loys de Chéseaux. They stretch about 55 to 70 light-years across, harboring a cosmic nursery where new stars are born.

Image
These two views of the Pillars of Creation show the difference that observing a target through various wavelengths can make. The visible light view (left) misses many stars in and around the pillars that are shrouded by dust. However, stars are plentiful in the infrared view (right) because infrared light effectively cuts through interstellar gas and dust.
https://astronomy.com/news/2020/04/a-st ... f-creation

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Witness
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Re: Cool astronomy photos

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NASA dreams big:
Direct Multipixel Imaging and Spectroscopy of an Exoplanet with a Solar Gravitational Lens Mission

The solar gravitational lens (SGL) is characterized by remarkable properties: it offers brightness amplification of up to a factor of ~1e11 (at 1 um) and extreme angular resolution (~1e-10 arcsec). As such, it allows for extraordinary observational capabilities for direct high-resolution imaging and spectroscopy of Earth-like exoplanets.
Under a Phase II NIAC program, we confirmed that a mission to the strong interference region of the SGL (beyond 547.6 AU) carrying a meter-class telescope with a solar coronagraph would directly image a habitable Earth-like exoplanet within our stellar neighborhood. For an exo-Earth at 30 pc, the telescope could measure the brightness of the Einstein ring formed by the exoplanet’s light around the Sun. Even in the presence of the solar corona, the SNR is high enough that in 6 months of integration time one can reconstruct the exoplanet image with ~25 km-scale surface resolution, enough to see surface features and signs of habitability.
https://www.nasa.gov/directorates/space ... Exoplanet/ for the details.

tl;dr: get a telescope far away enough to use the sun for gravitational lensing.