Questions tagged [photography]

Questions about photography of celestial objects by amateur or professional astronomers. Questions about photography of other objects are off-topic but might be asked on our sister site Photography Stack Exchange.

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20
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6answers
9k views

Does this smartphone photo show Mars just below the Sun?

I live in Essex, England (51.7678° N, 0.0878° E). On 25 July 2019 (hottest day ever in the UK, btw), 06:43 BST, I took this smartphone photo of the Sun. Is that white dot just below and left of the ...
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2answers
149 views

Why are there no photos of exoplanets?

There are a lot of photos of diffrent astronomial objects such as galaxies, nebulae and stars of which some are very far away. However there are no real photos of exoplanets (by “real photos” I mean ...
2
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0answers
36 views

Is there any free stacking program that stack images which are not aligned?

I liked to photo deep-sky-objects and planets with my camera Canon sx130. But I have never stacked images because they were too much apart. I was looking for some free astronomy stacking program for ...
2
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1answer
24 views

Telescope focal point and inversion

When looking at a diagram of the optical path through a newtonian reflector, the lines always cross before the eyepiece. I understand that the eyepiece is used to focus this diverging light cone so ...
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2answers
94 views

Sagittarius star cloud?

I was using SkySafari with my phone, but the compass didn't quite work. So as I knew where the cardinal points were, I think I have shot the Sagittarius star cloud, at least a part of it. Can you ...
7
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3answers
2k views

Attach a visible light telescope to the outside of the ISS

Visible light imaging of the heavens is limited on Earth primarily due to the atmosphere. I know the ISS is moving at 17000mph, but given the delays to the James Webb telescope, is there any merit in ...
2
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1answer
74 views

High quality, detailed images of planets on web

I have been looking for images of the planets and have found pretty decent ones of Earth and Venus from NASA. That detail is opposed to this one of Uranus: And these of Mars, (and this and this) I ...
1
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1answer
74 views

What are the most popular galaxies for which we have images? [closed]

The only galaxies I can think of (not being an astronomer) are Andromeda and Milky Way. There are 51 near galaxies, but they all pretty much say "satellite of Milky way" or "satellite of Andromeda". ...
3
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1answer
115 views

Why does the moon 'peel' away from the horizon in this photograph?

The Himawari-8 geostationary weather satellite recently had a lunar intrusion into it's primary sensor (the Advance Himawari Imager, or AHI): Zooming in on the moon: I see a strange cupping (or '...
3
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1answer
114 views

How are space telescopes stabilised to a perfect standstill?

I assume that for space telescopes to get good images, they must be put in perfect standstill, as even the slightest deviation in the viewing angle is amplified by the distance of observed objects, ...
1
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1answer
62 views

False-color wavelength assignments in this “drop-dead gorgeous” image of NGC 2903?

C|Net's Hubble spots drop-dead gorgeous spiral galaxy tucked into Leo links to NASA's Hubble Spots Stunning Spiral Galaxy which shows the image below. The caption on the NASA page doesn't mention the ...
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1answer
119 views

If a black hole does not emit light, how can one take a picture of the black hole itself?

There's some discussion that the image composed by the Event Horizons Telescope is really just an accretion disk. To "take an image" of something, you need the light reflecting off of the surface of ...
3
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1answer
176 views

Is this the best non-radio image of whatever's at the center of M87? How was it taken?

The BBC News article First ever black hole image released shows the instantly-iconic radio image of the (almost certainly) supermassive black hole at the center of the M87 galaxy, just released by the ...
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3answers
6k views

Help understanding this unsettling image of Titan, Epimetheus, and Saturn's rings?

The NY Times article Saturn’s Rings Are Sculpted by a Crew of Mini-Moons is really interesting and links to the recent paywalled paper in Science Close Cassini flybys of Saturn’s ring moons Pan, ...
3
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1answer
134 views

Pictures of galaxies, nebulae: which way is up?

We are used to viewing pictures of the Earth and the planets with their North Pole pointing towards the upper portion of the photo. But when a space telescope snaps photos of cosmic entities, do they ...
2
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0answers
71 views

Why do these Hubble images of Neptune look like Cheela?

The open access paper Formation of a New Great Dark Spot on Neptune in 2018 (cited in Gizmodo's Formation of Dark Vortex on Neptune Captured For the Very First Time and Phys.org's Hubble captures ...
2
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1answer
80 views

How to understand this multi-day exposure photograph of Jupiter and the Moon

This answer includes a stunning photo of the Moon and Jupiter "Trails of the Shifting Moon" by photographer Jin Lu. The caption reads: From the photographer: "I spent 4 days capturing the trail of ...
6
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1answer
878 views

Calculate the true diameter of stars from photographic plate

I am reading the book "Fourier Analysis" from T. W. Körner, and in chapter 95, he explains how you can compute the diameter of stars on a photographic plate. He says that "Since observations of the ...
2
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2answers
80 views

Options for first time astrophotography w/ 80/900 refractor?

Recently I bought a telescope and I started to take pictures of my observations. The most basic solution, I'm using a smartphone adapter and my Xiaomi Mi 6 camera to do that but the images (except for ...
4
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1answer
209 views

What's going on in this photo of Halley's comet's tail?

When researching for this answer I was looking at Space.com's 2011 article Photos of Halley's Comet Through History I saw the image below, and read the caption. Halley's Comet in 1910 ...
8
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1answer
179 views

What's the white glow around this star?

A few days ago, I took a photo of the night sky in the mountains of Georgia with my DSLR. There, I noticed that one single star (in the center of the part of the photo that I added below) looks very ...
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0answers
32 views

If I point a camera at a “+x” visual magnitude object, how to estimate how many e- (carriers) are produced per second?

In this answer I estimated that if a DSLR (digital SLR) camera with an aperture of 40 mm were pointed at a satellite in geostationary orbit with a visual brightness of about +11 magnitude, it would ...
6
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1answer
244 views

If we had the right technology could we see a distant star in detail?

If, for instance, Hubble's camera was a 10^300 times better could it see a distant star in details or is there a limit to the amount of light that reaches the earth's orbit or perhaps does the light ...
3
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2answers
114 views

I've seen some stars tonight. What could I possibly have been looking at with these pictures?

The weather tonight here is great and I decided to shoot some hand-held (too bad I don't have any tripod) night mode pictures shot with P10. I have no experience in stars observation therefore I can't ...
6
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1answer
66 views

Is there any star recognition framework/library available?

Being a daytime software engineer and a sparetime photographer, I was looking for a nice DIY project for the next weeks. I finally decided to build a star tracker with a camera mount, so that I can ...
4
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4answers
157 views

How much telescope do I actually need for astrophotography?

I've done the 'sparkly curtains behind landscapes' form of astrophotography for years with DSLRs, lately full frame Nikon. I know what I'm doing with the camera, and want to take the next step into ...
2
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2answers
114 views

Why do we use filters in telescopes for astronomical imaging?

I have read that if we image without a filter we get no information about the color or SED of objects. Can anyone elaborate the reasons for using filters for imaging/photometry? What happens if we ...
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1answer
125 views

Calculating the Size of Earth in the Apollo 8 Earthrise Photo

I was debating with someone online (I know, great way to get nowhere fast) regarding the size of Earth as it appears in the famous 'Earthrise' photos from Apollo 8. Below is an accurate (almost pixel-...
2
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0answers
43 views

Why can't I use automatic photometry on IRIS?

I'm trying to do photometry on my stacked images of the night sky, but when I use the program IRIS and try to do automatic photometry, it always says it's a wrong image number and in every example of ...
1
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1answer
68 views

Is it possible to see an image with radio telescope of something not so far away in detail?

Can an image of a person using a radio telescope see a person from far away? Could a radio telescope be made to see someone walking on Mars? https://space.stackexchange.com/questions/30477/could-we-...
14
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3answers
3k views

Which part of the milky way does the image show?

As a general question and more in specific regarding the image above: Which part of the milky way, planets, stars, clusters are included in the image? How can I know which entities are included in ...
4
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2answers
116 views

Telescopes for beginner astrophotography

I'm a fairly experienced photographer and have enjoyed taking lots of photos of the night sky with my existing gear - wide angle starscapes over pretty hills, mostly. I'd like to move on, having ...
2
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1answer
59 views

Measure an angle in the sky from a photo?

Let's say I have an picture of the sky or of an landscape and I want to measure an angle in the celestial sphere. Is there any software for that? In real life I would use the empirical hand gestures ...
5
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1answer
175 views

What is the meaning of “bright unresolved sources”

In many articles talking about telescopes, they talk often of "bright, unresolved sources". "bright" usually mean that the magnitude should be less than a certain threshold, (or that the signal to ...
18
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2answers
4k views

What did I photograph?

Last night I was experimenting with my mobile phone shooting the night sky adjusting some settings like shutter time and ISO. One of the first pictures I thought was a complete failure, I only ...
3
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1answer
154 views

Is the dot on the photo - Mars?

The below photos were taken yesterday (August 4, 2018) at about 10 p.m. from the plane over the Black Sea. We were seeing the light dot on the left for at least 10-20 minutes. It looked like a bright ...
3
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2answers
109 views

Can a telescope image be amplified to see more by adding distant lenses or mirrors?

Could a lens or mirror be placed in orbit on the same flight path with other parts to make a telescope or on the horizon of the moon to see farther with the Hubble?
5
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3answers
728 views

Why do photos of Earth always have a black background?

if we are in the milky way, and people are able to take photographs from Earth that look like this: Then how come almost all of Earth's photos look like this? In the first photo, we are seeing what ...
4
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1answer
55 views

Does the focus of terrestial telecopes need adjustment for the distance of astronomical objects?

My rudimentary experience of photography and telescopes suggests that with commonly affordable optics any object beyond the range of hundreds to thousands of feet will be in adequate focus at the ...
4
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1answer
85 views

Is it possible to image a meteor so the rock is visible?

I was wondering what one would see if they were to look through a telescope tracking a meteor as it shot through the sky. Technology aside, would one be able to see the object tumbling or would it ...
5
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4answers
212 views

Measurement uncertainty of the computed center of gravity from pixel image

Establishing the position of celestial bodies (stars, and other objects) is based on imaging technology. Depending on the resolution of the imaging sensor used, an object is identified by a group of ...
3
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1answer
69 views

How to improve the quality of an image of the planets when taken through the eyepiece of a telescope with a dlsr camera

I have a reflector telescope with a 114mm aperture and 1000mm focal length. I find that to get the clearest image I can use a 4mm eyepiece, or with my 5x barlow a 20mm however, seeing that I am very ...
2
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1answer
61 views

Astrophotography: Is there a rule to the color mapping?

As I understand it most astrophotography is colored using filters and multiple exposures. I would assume that blue filters would be used for higher frequency emissions and red filters for lower ...
3
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2answers
231 views

My first pictures of Jupiter

Well, I'll start off by saying I am certain I am doing it wrong! Now that I got that out of the way here is my image: I have a feeling I can't see the planet because I need a filter to block out the ...
1
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3answers
428 views

Photographing Venus with a phone through a telescope

I took a picture of Venus through my telescope (Celestron Astromaster 130eq) using a 10mm lens with a Barlow lens. The picture isn't really good since I took it with my phone and I still don't have a ...
3
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1answer
184 views

How to calculate the position to be to see ISS passing in front of the moon or the sun?

I would like to know how to calculate the time/date of the ISS passing in front of the moon (between the observer and the moon) or the sun, or to calculate the position in which the observer have to ...
1
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1answer
63 views

How could I determine what areas of the Milky Way will be visible?

There is a new moon on Saturday, and the forecast in my area of Winnipeg, Manitoba, Canada calls for clear skies on that night. I would like to take a widefield astrophotograph. I have no idea what ...
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0answers
49 views

Why stars are not visible in photos of Planets from space [duplicate]

The night sky from many parts of the Earth, away from any city lights and pollution, is full of starts, mostly the stars of the Milky Way Galaxy is what fills the night sky densely. In many photos of ...
2
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2answers
134 views

Location of the milky way in August in Death Valley

I am going to be in Death Valley around August 8th. I was hoping to take a milky way shot with my camera when there. I would be shooting around 10pm. I am using google maps to scout out popular ...