What is the definition of "deep space"? - Astronomy Stack Exchange
2016年4月2日 · Deep space is the vast region of space that extends beyond our Moon, to Mars and across our solar system. Again, not exactly an academic context, but Govert Schiling (the author of Deep Space: Beyond the Solar System to the End of the Universe and the Beginning of Time) in relation to astronomy defines deep space differently: In a sense ...
time - Asteroid in Deep Space - Astronomy Stack Exchange
2023年8月8日 · You could observe the apparent movements of the stars and galaxies, and it may take a very long time, but you could in theory observe that they move relative to one another over time in a way that is consistent with your asteroid floating through space -- but it's equally consistent with those stars and galaxies being in motion while you stay ...
Surface brightness of deep-sky objects and telescope specs
2018年6月3日 · 3. Although you have not given any information about your telescope, the Orion nebula is easy to see with almost any telescope, even under urban light polluted skies. Surface brightness is almost always greater (ie fainter) than magnitude - so for example the total magnitude of the Orion nebula is about 4 (from memory) but you say surface ...
How many space telescopes are currently active? - Astronomy …
2021年3月30日 · 8. More than 20 if the Wikipedia's List of Space Telescopes is accurate. I extracted the active ones, and removed duplicates (to the best of my knowledge): NICER (Mounted on the ISS). Interestingly, the majority is satellite …
Why are there so many seemingly blue-shifted galaxies in deep …
2016年3月12日 · NASA released this image of deep space. The way light shifting vis-a-vis universe expansion is supposed to work is by making the furthest galaxies appear mostly red-shifted. But NASA's image shows somewhat of an even balance between blue and red shift.
What would happen if we released water into deep space?
2018年1月22日 · 5. Liquid water can't exist in a vacuum. Water in space (atmosphere, no gravity) tends to form into a ball, but take away the atmosphere and it would rapidly fly apart. It actually wouldn't look like boiling. You get boiling on Earth because water is held in a pot by gravity. In empty space the water would rapidly and somewhat explosively disburse.
interstellar medium - Deep space radiation distribution
If you were in deep space, i,e., a spot somewhere between galaxies, then the night sky would look a lot like the sky seen by astronauts in the ISS, when they look away from both the ecliptic plane and the galactic plane, minus the individual Galactic stars.
observational astronomy - What are the technologies needed to …
2024年4月11日 · Are direct conversion optical receivers being looked at for future deep-space communication? How is the maximum data rate of the Psyche mission's Deep Space Optical Communications (DSOC) system expected to scale with distance? Quantitatively, why will optical communication be better than X-band for deep-space communications?
photography - Astronomical animations of deep space objects
for deep space objects like galaxies, nebula, Binary star, etc? Or it is really not possible to get animation, because it is too far and everything is looks very slow from earth? Because whatever I found so far is only solar system animations (planets, moon, Sun, etc), software simulation or Artist's impression.
Does mass create space? - Astronomy Stack Exchange
4. Yes, there's more volume with more mass. (However, there's also "less time", therefore, it's complicated with spacetime) Let's assume the Schwarzschild-metric with Schwarzschild-coordinates for simplicity. And let's assume a sphere, not cubes, for simplicity (spherical symmetry) The general spherically symmetric spacetime is.