Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [milky-way]

Questions regarding the Milky Way Galaxy, the galaxy that Earth's solar system is in.

0
votes
0answers
26 views

Full picture of our galaxy from the outside [duplicate]

How far a spaceship should travel to take a full picture of our own galaxy from the outside?
1
vote
1answer
63 views

What is the likely closest encounter for a typical star during the Milky Way Andromeda Merger?

This is closely related, but distinct question to What are the chances of a star colliding with another during a galactic collision?. The accepted answer to that question places the odds of the Sun ...
0
votes
1answer
28 views

How do I find stars within milky way using galactic latitude and longitude

I have data that contains galactic latitude and longitude of stars. I have to determine all the stars that are within our milky way. How do I find it?
6
votes
3answers
194 views

Whereabouts of the Pleiades

I assume they should be in the Milky Way galaxy. I have read about it a little but did not find information on where they are. Which galaxy do the Pleiades belong to?
1
vote
1answer
140 views

What is that light of the middle of the milky way galaxy?

I'm Being confused what is that light in the middle of milky way galaxy? Image is from Charting the Milky Way From the Inside Out The text with the image explains a lot about the spiral arms and the ...
1
vote
0answers
10 views

Clarity on dust extinction terms and implementation: R_V, A_V, and E(B-V)

I have created a model galaxy spectrum using STARBURST99 and want to compare it to an observed spectrum of a particular galaxy. I understand that I need to redden ...
0
votes
0answers
25 views

Why not capture also Milky Way's black hole image? [duplicate]

The world has now seen the black hole "close-up" of M87. Besides the recognition to how awesome science has become in the 21st century, I have the following question. Didn't they work also to ...
1
vote
1answer
45 views

The equation for calculating how many times Earth (or our solar system) has revolved around the Milky Way

I have seen it said on Quora and Reddit that it's about every 220-250 million years to go around the Milky Way from Earth. Wondering what the rough equation is for calculating it. That is, I guess, ...
1
vote
0answers
29 views

Luminosity of the Milky Way compared to Seyfert galaxies

This page lists the total luminosity of the Milky Way Galaxy to be $4\times10^{10}$ $L_{sol}$, and $L_{sol}=3.86 \times10^{33}$ ergs.sec$^{-1}$; this gives a total luminosity for the MW of $1.54\...
1
vote
1answer
70 views

Earth orbit around the Sun and its position in the Galaxy

Given the orbit of the Earth around the Sun and the position of the Sun in the Galaxy, in which season are we (the Earth) closer to the galactic center?
1
vote
0answers
73 views

What pole is closer to the galactic edge? [duplicate]

Suppose 2 spaceships leave from the earth's north and South Pole going straight up which one will exit the galaxy first (assume they have the same speed and are going in a totally straight line) ? ...
5
votes
1answer
52 views

How many horizontal branch stars are within 2 kpc of the sun?

For my research purposes, I am wondering how many horizontal branch (HB) stars are within 2 kpc of the sun? I tried to find some with the Gaia DR2 data with a magnitude cut that leaves HB stars out ...
1
vote
1answer
65 views

does the orientation of orbital plane of our solar system rotate with the galaxy

As I understand it, our solar system travels through the milky way with the orbital plane tilted about 60 degrees so that we are sort of traveling in the direction of earth's north. My question is if ...
0
votes
1answer
91 views

What’s the closest earth like planet we have discovered in our galaxy? [closed]

What’s the closest earth like planet or moon to earth we have discovered in our galaxy?
3
votes
1answer
100 views

If the Milky Way galaxy is as big as planet earth, how big is Earth?

If the Milky Way galaxy is as big as planet earth, how big is Earth?
3
votes
1answer
93 views

What is the angle between the planes of Oumuamua's hyperbola and the Milky Way Galaxy?

Viewing the animations of Oumuamua passing through the solar system, it is apparent that the plane of its hyperbola departs from the plane of the ecliptic by a large amount. The plane of the ecliptic ...
10
votes
1answer
220 views

What would our night sky look like if the solar system was 100 light years from the centre of the Milky Way

When we look at photo's of the centre of the Milky Way, it looks extremely bright due to the concentraion of star systems... If our solar system was only 100 light years from the centre of the Galaxy,...
2
votes
2answers
163 views

Are the viewable nebulae only in our galaxy?

Where are all the nebulae located? Yes, a simple question that should be obvious but apparently is not to me. To be more explicit, how far are all these objects? Are they mostly in our galaxy? I'm ...
8
votes
1answer
1k views

Why the blank wedges in this very early 21 cm map of the Milky Way? (Oort et al. 1958)

Jan Oort was a pioneer in radio astronomy. Wikipedia says: It has been written that “Oort was probably the first astronomer to realize the importance” of radio astronomy. “In the days before radio ...
3
votes
1answer
76 views

In which direction does the ecliptic plane make an angle of 63 degrees with galactic plane?

In which direction does the ecliptic plane make an angle of 63 degrees with galactic plane? Is it toward the galactic center? (It can have any 360 degree orientation.)
2
votes
0answers
38 views

What are the odds for any two bodies to collide during the milky way-Andromeda collision? [duplicate]

When the two main galaxies of the local group will collide, it is very unlikely for stars to collide with another, but how unlikely is it in the initial collision? And over the whole merging process?
1
vote
2answers
229 views

Where is the center of the Milky Way located?

I have downloaded a star database from this page (The HYG Database): http://astronexus.com/node/34 And all the stars have (among other parameters) their XYZ coordinates in parsecs according to this ...
1
vote
2answers
100 views

Movement of the Sun in space

Does the Sun undergo any cycles or revolutions approximately every 24,000 years or 8.6 million years? In Hinduism it is believed that the Sun revolves in an elliptical orbit around a large mass at ...
14
votes
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 ...
3
votes
2answers
128 views

Of the stars in the Gaia / Hipparchos catalogs, which one is the most isolated?

This is just a matter of curiosity; I was thinking about a scifi story. By "Isolated", I mean that if for every star (or binary) we found the distance to its closest neighboring star, then which one ...
1
vote
1answer
76 views

What factors determines the size of a galaxy?

Recently i saw a post comparing sizes of different galaxies with the Milky Way. The largest one being the Ic 1011.What makes this galaxy so large? What factors decide the size of a galaxy?
11
votes
6answers
6k views

What will happen to the shape of a galaxy when a super massive black hole lying in its center dies(evaporates out)?

What's at the Center of the Milky Way? In this article it is said that a supermassive black hole lies in the center of milky way galaxy. At its center, surrounded by 200-400 billion stars and ...
2
votes
2answers
149 views

A rough analytical expression for the Milky Way's radial mass distribution?

I found the image below in Space.com's article This 3D Color Map of 1.7 Billion Stars in the Milky Way Is the Best Ever Made, although it is not the map mentioned in the title. The caption for this ...
2
votes
1answer
53 views

Direction of movement sun with respect to the NGP

When viewed from above, i.e., looking down from the North Galactic Pole towards the South Galactic Pole, does the sun rotate clockwise or counterclockwise around the Galactic center?
5
votes
2answers
883 views

Does the Milky Way belong to a Galaxy cluster

I know that the Milky Way is a member of the Local Group and the Virgo Supercluster / Laniakea Supercluster. However, I can't seem to find any information about the Galaxy cluster we belong to. Does ...
1
vote
1answer
61 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 ...
18
votes
1answer
4k views

How far do we have to go to leave the galaxy?

How far is the sun from the edge of the galaxy in the following directions? Moving along the shortest path parallel to the galactic plane (outward radially) Moving along the longest path parallel to ...
3
votes
1answer
286 views

Has a “white hole” theory been advanced to explain anomalous star formation in Sagittarius A?

In 2008, the European Southern Observatory reported, upon the end of a 16-year study described here http://www.eso.org/public/usa/news/eso0846/, that the 28 stars nearest the very large black hole in ...
2
votes
1answer
582 views

Coordinates of known black holes in our Galaxy (Milky Way)

There are some articles in wikipedia with the list of known (or candidates) black holes here and list of nearest black holes. Also there is a map of Milky Way. My question is where can I get ...
1
vote
1answer
415 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 ...
2
votes
2answers
48 views

Movement of the stars relative to my position

I live in the Pacific North West (Washington State, US). I have watched the skies for years, looking for constellations that I recognize and keeping track of them. One of them is Orion. As I have ...
1
vote
3answers
382 views

Is the Milky Way seen as how it looked millions of years ago?

The distant an interstellar object is, the more time is required for light to travel, which is known, measured as light years. So are the farthest stars and gas clusters in the Milky Way seen as how ...
2
votes
2answers
118 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 ...
5
votes
2answers
272 views

Can we see the stars the at the edge of the Milkyway?

This question proved much more difficult to formulate than I initially imagined. It concerns how far out in the Milky Way that we actually see with different telescopes. I know the Milky Way disk is ...
5
votes
1answer
848 views

Solar system data API?

I'm prototyping a real time solar system / milky way discovery app. Could you please help me on: -What is the best orbital data public API I can use? -What is the standard numerical way to define ...
1
vote
0answers
52 views

Modern Astrophysics [closed]

I was wondering whether it has proven whether the universe is expanding and if so, what is its ratio, one more question that whether it has an effect for the centrifugal forces, i.e gravity and the ...
6
votes
3answers
285 views

How is the Milky Way on a collision course with Andromeda when the universe is expanding? [duplicate]

At some time in the future it is said our galaxy will collide with Andromeda. Yet at the same time the universe is expanding at a ever-accelerating pace. Using the old raisin-in-the-baking-loaf-of-...
7
votes
2answers
434 views

Has the Milky Way collided with another galaxy?

Has the Milky Way ever collided with another galaxy? Or will the collision with Andromeda be our first?
6
votes
1answer
143 views

How was the galactic plane established?

As pointed out in this answer the axes of galactic coordinates are defined such that galactic longitude and latitude (0, 0) point toward the galactic center. But then the plane defined by galactic ...
2
votes
0answers
103 views

How to to compute the expected number of collisions between stars when Milkyway and Andromeda merged? [duplicate]

Can some one tell me how you can roughly estimate the number of collisions when Milkyway and Andromeda merged with each other. I know it is somehow related to the mean free path of the star. But ...
3
votes
1answer
147 views

Where are heavier elements than iron produced?

Specifically in the milky way, if that changes anything. I feel like it should be in the disk, since stars there are richer in heavier elements, but I'm not sure.
-1
votes
1answer
69 views

Would Bussard Ramjets work in other places in or near the galaxy? [closed]

Sorry if this this doesn't really fit this forum, but WorldBuilding does not like questions like these. I cannot find the minimum density of hydrogen a Bussard ramjet (an interstellar ship propelled ...
5
votes
1answer
235 views

Collision with Andromeda Galaxy

According to Hubble's law, the universe is expanding and this expansion is proportional to distance between the two objects and thus objects are moving away at a very fast rate, then why is it ...
1
vote
1answer
78 views

Find a planet with incomplete information of a star chart [closed]

I am wondering why it was so hard to locate Luke in Star Was Episode 7, if you already have the small part of the map. Suppose we have a sector of our galaxy that roughly equals the one missing in ...
2
votes
1answer
487 views

Milky Way, view outward or inward?

I have a question about the view of the Milky Way that we can see from earth with the naked eye. I believe this to be light from the stars contained in one of the "arms" of the galaxy. I had always ...