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Questions tagged [night-sky]

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Comparing accuracy in Starry Night and Alcyone Software

From what I understand, Starry night (https://starrynight.com/starry-night-7-professional-astronomy-telescope-control-software.html) is more focussed on simulating the night sky whereas Alcyone (...
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1answer
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How does the Moon move in the “night” sky as seen from the poles?

A photo in the NYTimes article Ice Surveys and Neckties at Dinner: Here’s Life at an Arctic Outpost has got me thinking. During the winter months at either the north or south pole, when it is ...
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1answer
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Throughout the year, are all parts of the night sky visible from any given point on Earth?

Or are there points on Earth where certain parts of the 360° night sky are never visible throughout the whole year? Depending on the answer to this question, are there points on Earth where parts ...
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What would go into the design of a sky quality meter, used to measure night sky brightness?

@MCG's answer mentions several methods to classify night sky quality or brightness, and goes on to say: Additionally, you could always purchase a SQM (Sky quality meter) which is a small, portable ...
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1answer
857 views

Orange light in sky

It is 1:15 am, 8/10/18 in Indiana. I looked out my kitchen window and saw an orange light to the north with the color of a street light but clearly out in space. It was about as high as a full moon ...
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1answer
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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 ...
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1answer
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Why does in-the-sky.org say that Mercury is not visible from Taipei these days?

I know that viewing Mercury is a challenge, but I'm fairly close to the equator and Mercury was at greatest elongation just a week ago. In-the-sky.org says: All around the world, Mercury is ...
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2answers
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App that shows what's passing in sky?

I'm not an astronomer but I enjoy looking up at the sky. So tonight I saw something moving in the sky. It looked like a star, and it was definitely not a plane (I checked in flightradar). Is there ...
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1answer
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How will planets behave in the night sky as seen by Mars colonists?

Certainly among the first colonists on Mars there will be a few people interested in Astronomy enough to enjoy the night sky. For them, familliar Mars will be missing and there will be a new, ...
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1answer
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Best locations for large telescopes at high northern latitudes

Large optical telescopes want to be located at high altitude (get above as much of the atmosphere as possible). I get the impression that there is also a preference for low latitude (see as much of ...
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1answer
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Brightest star visible from Italy and Argentina

A friend of mine tends to ask crazy question about everything. Today he ask me what is the brightest star that is visible on both the hemisphere and in particular from Italy and Argentina. I tried to ...
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1answer
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Mars night sky — Phobos and Deimos?

I'm having a debate about how bright Martian nights would be, in terms of both the sky itself and ground illumination. This answer seems to indicate that the stars would be only dimly visible, and ...
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1answer
169 views

Why the Milky Way appears to be arching across the sky?

The Milky Way galaxy is disc-shaped and earth is in its plane: (source) In the following image the milky way appears to be arcing across the sky: (source) This looks like an out of plane view of ...
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1answer
131 views

What did the night sky look like 100,000 years ago?

Question in the title. Would any constellations be identifiable?
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0answers
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Creating planispheres from the perspective of nearby objects

I'm attempting to create a set of [reasonably] astronomically accurate planispheres from the perspective of observers positioned at the north or south poles of various nearby celestial objects. So ...
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1answer
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Stars in multiple constellations

Are there examples of single stars that are a part of multiple constellations? What about stars that are part of one Western constellation and one non-Western? Thanks in advance!
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3answers
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Star map - finding stars

Assume you are given a star map that doesn't have the name of the stars on it. You know the latitude, longitude of the observer and the local time (year, month, day, local time). How could I proceed ...
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5answers
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What is this rapidly twinkling red, blue, and white star I saw?

Last night, I was on my balcony at 1AM (PST) and I looked up and saw two stars near the horizon (I'd guess ~30 degrees above the horizon), and they were "twinkling" about twice as fast as other stars ...
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Is there a Free repository of pictures taken everyday of the night sky?

I'd like to know if there's a repository out there of pictures taken everyday of the night sky. Not looking forward to anything fancy. Maybe a group of people out there have set up something out of ...
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2answers
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Planets visible at night

Stars give off light and are visible at nighttime but Planets do not give off light . So why are Planets visible at nighttime ?
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2answers
442 views

Where can I find a visible star dataset?

I'm trying to do a project for a databases class where I have a user enter their current location and I tell them what constellations/planets/etc are visible in their area. I've seen this data ...
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4answers
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Is there an example of a star that is already dead, but can still be seen on earth?

While looking up at the stars I wondered, what are the odds that some of them are already dead. I did some research and found a very interesting article here. It states that the odds are rather small, ...
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How can we see Venus at night? [closed]

According to the Globe Earth Theory, the Sun is in the middle of the Solar System and the Earth is the 3rd planet from the Sun, making Mercury and Venus between Earth and the Sun. If this is true, ...
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What exactly is the “paradox” in Olber's Paradox?

To the extent of my understanding, Olber’s paradox states that if the universe was static and homogeneous, we should see a star at every point in the night sky and therefore the night sky should be ...
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2answers
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How much light would be reflected from Jupiter to Europa (in Europas night)?

Suppose Europa is found habitable and humans start living on it. Europa is close to Jupiter and during the night Jupiter would be reflecting light to Europa, just like our full moon reflects light to ...
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3answers
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What of the following moon-situations would be better?

Okay, so imagine that there is an Earth-like planet, with the following conditions: It's further from it's sun than the Earth is from the Sun (not much, but enough for weather to be a little colder ...
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1answer
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Is night sky getting brighter day by day?

Night sky is dark because light from distant stars has yet not reached our earth. Light emitted by stars formed after the instant of creation i.e. 13.7 billion light years ago is on the way to reach ...
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1answer
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What is the specific term for time of the night when there is no moon?

There are times when the sun goes down and it takes a while for the moon to rise, because the moon obviously doesn't rise with the sunset whole year. I guess this happens only when the moon is full. ...
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1answer
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Star like lights at night [closed]

me and my friends likes to stargaze at night and every time we see this star like light that glides in one direction. they sometimes even cross in the middle then disappear sometime. i observed that ...
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2answers
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Why can I see the Andromeda Galaxy despite Milky Way's rotation?

Okay ... so, I woke up from a dream last night wherein I was (apparently) attempting to devise a time-keeping system for interstellar travel (similar to the stardate system used in Star Trek). In the ...
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2answers
162 views

Can someone help me to identify this section of the night sky?

I have this image from a treasure hunt, I'm fairily certain it's a real piece of the sky, but I've been unable to identify it, can anyone help?
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1answer
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Sky in the very far future / past

Motivated by this question about a stranded submarine in the Jurassic I would like to know: Is there anything remotely left of our current skyline if we go back or forward millions of years so that ...
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2answers
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Why don't we see “the milky way” in both directions?

We're (basically) in the middle of an arm of our galaxy. That is to say, we're sitting in the middle of a dense disc of stars. It would seem to me that. You should see: the thick line of the milky ...
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Faint whitish-blue light around the moon [duplicate]

While i look up at the full moon mostly I see a very faint whitish-blue glow around it.as far the white is concerned I guess that to be because of the lens in our eyes and the white color of moon but ...
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1answer
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How much clearer are stars in earths orbit?

As a child I remember my parents taking camping in California, and upon stepping out of the car I was awestruck at how thick the Milky Way galaxy was and at the number of stars everywhere. I've always ...
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2answers
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From our world's perspective, does the full moon look larger in one city than it does in another?

When I was a very little girl, my dad talked about the HUGE full moon he saw while in the navy. He made the comment during a full moon we were having in Western NYS. He said, this (harvest) moon is ...
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2answers
184 views

In what parts of the world is it impossible to view the night sky due to light pollution?

Growing up far from any city, I have always been able to view the full night sky. It was just the way how things were. Of course, I knew that light pollution is a thing, and that the sky is a lot less ...
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356 views

The light of which star is next to reach the earth?

I heard that the sky wouldn't be dark at night if the light of every star had already reached the earth. Of which (currently invisible) star will the light reach the earth next and when will that be? ...
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2answers
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Why celestial objects appear brighter in the night sky than in photographs from closer proximity?

The moon, for example, appears very bright in the night sky, but quite dark from photographs on/near its surface. Similarly, Mars and Venus appear as bright dots in the sky but in closer photographs ...
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1answer
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How come the northern and southern lights are the same?

Not an expert, hence the question. To my knowledge the magnetic field of the earth travels south to north. Wouldn't there be a bias on whether the charged particles causing the auroras are negatively ...
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1answer
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What would the night sky look like if the interstellar medium didn't exist to absorb or block light?

I was curious about how much brighter it would be and how much further we could see.
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Can you see the stars when it is trickling?

I am writing a book with the following scene in one chapter: It is trickling and my protagonists are outside looking into the night sky, looking to the stars. Reviewing the scene I am wondering: Is ...
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Are there any bright non-stellar objects which make up asterisms?

Hopefully the title is very self-explanatory. I was wondering if there were any non-stellar objects, such as bright galaxies, which when looking with the naked eye were mistaken for stars in the time ...