By analysing light as it passes by a black hole - gravitational lensing.
Also, if a host star is close to a black hole, it is possible to observe the movement of gases from the host star to a black hole.
Black holes are invisible to the visible light spectrum and many others because their gravity is so strong it pulls in even light. So in theory yes. But a human body is FAR too light to ever form a black hole. However, if you define visibility as human perception of it, while we never see light from a black hole, we would notice the absence of light in an area, so even if it were possible to turn your body into a black hole, no one would see you, but the would see a black gap in space where you should be...
The first black hole discovered is Cygnus X-1, which was identified in 1964 as a strong X-ray source in the constellation Cygnus. It is a binary system with a massive, invisible companion that is believed to be a black hole about 15 times the mass of the Sun.
The answer is, you cannot see photos of a black hole. You are quite right; not even light can escape a black hole's incredible gravity, so all black holes are completely invisible. It is possible, however, to see long trails of matter that is being pulled into a black hole. The way we detect black holes from earth, however, is by picking up the gamma rays that they emit.
An invisible star could refer to a theoretical black hole, which cannot be directly observed because light cannot escape from it. Alternatively, a brown dwarf, a failed star that emits very little light and is difficult to detect, could be described as invisible.
Yes - The dense nature of a black hole rearranges and transforms matter into energy. In fact, even before matter crosses the threshold of the black hole's event horizon, the accretion disk of a black hole provides for a formidal barrier. Despite its invisible interior, the presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as light. Matter falling onto a black hole can form an accretion disk heated by friction, forming some of the brightest objects in the universe.
Yes and no. It is rather hard to explain, because black holes are so dark and black that no living creature can see them, which in a sense makes them invisible, but you can also see where a black hole is because it sucks in light, too, so that would also, in a sense make it visible, but the my main answer would be, no black holes are not invisible.
A black hole is invisible because its gravity is so strong that not even light can escape from it. This phenomenon is known as the event horizon, which marks the point of no return for anything crossing it.
Black holes are invisible to the visible light spectrum and many others because their gravity is so strong it pulls in even light. So in theory yes. But a human body is FAR too light to ever form a black hole. However, if you define visibility as human perception of it, while we never see light from a black hole, we would notice the absence of light in an area, so even if it were possible to turn your body into a black hole, no one would see you, but the would see a black gap in space where you should be...
No
No, black holes are actually invisible because it can suck it Light as well, so no light can escape from the black hole.
Only around a black hole. There is a sphere around every black hole where light orbits the black hole.
We know nothing about the conditions within a black hole, but it seems unlikely that a black hole could exist within a black hole, or even if this concept would have any meaning at all.
black holes are invisible because its gravitational pull is so strong even light cant escape from it. so what scientists do is they look at things around the black hole. if there is a black hold near a planet or star that objects orbit will be altered and it will be heating up from the friction of going into the hole.
We can't see a black hole because it does not emit any light. Its gravitational pull is so strong that even light cannot escape from it, making it invisible to the naked eye.
a hole
From Earth, a black hole would appear as a dark, featureless region in space, surrounded by a glowing ring of hot gas and dust spiraling into it. The black hole itself would not emit any light, making it invisible to the naked eye.
Yes, a quasar is a galaxy with a super-massive black hole in its center. The hole being invisible, all light vanishing from the great gravity. The quasar itself, among the brightest, most luminous objects in the universe, is being powered by an accretion disc around the black hole.