Astrophysics

Generally true, planets don't emit their own light, but are visible largely because of reflected light, the illumination provided by their star, in the case of our solar system, by the Sun. Some planets might produce trivial amounts of light by other means, for example from lightning, volcanism, mineral fluorescence, etc.

The girl in the "Black Hole Sun" music video by Soundgarden is actress and model Carolyn Espley. She plays a young woman with exaggerated facial features in the surreal and twisted video that features various distorted characters.

Strictly speaking, no; stars are incandescent (light resulting from heat) as opposed to luminscent (light resulting from non-thermal based effects). One might, however, safely describe stars as "luminous" in a metaporical sense.

The phrase "least dense planet" refers simply to the planet with the lowest density, which is the planet's mass divided by its volume. In our solar system, Saturn is the least dense planet with a density of roughly 0.7 (water, by comparison, has a density of 1, or 1 gram per cubic centimeter). This is attributed to its large outer envelope of gas - although it is thought to have a denser rocky core.

No, the celestial sphere is a notional entity which is basically the "background" of stars against which the Sun, planets, etc., appear to move throughout the year. It is convenient for astronomical notation. The ancients used to believe there were some kind of spheres which stars and other celestial objects occupied and which was used to explain their movement.

A black hole can have an electric charge if it swallows electrically charged objects, but no objects that we know of have magnetic charge. Magnets always have both a north pole and a south pole; there is no evidence that one can exist alone. A lone north or south pole would be called a magnetic monopole, and would have magnetic charge. If we discovered a magnetic monopole and fed it to a black hole then the black hole would gain the magnetic charge.

In our solar system, Earth is the only planet with any significant amounts of surface water (and land).

The inner planets, also known as rocky or terrestrial planets, do not have significant ring systems.

First, you got to understand something. A black hole is just as a block of ice. The smaller it is the faster it melts. So speaking scientifically the black hole releases radiation relatively faster when its smaller than when it's bigger, which heats up the dead star. For that reason the black holes evaporate over a long time

A T Tauri star is a young, pre-main sequence star that is in the process of contracting and heating up. They are typically located in regions of active star formation, surrounded by a protoplanetary disk of gas and dust. T Tauri stars are known for their strong magnetic fields and variability in brightness.

A black hole does not have a "bottom" in the traditional sense. Once an object is past the event horizon (the point of no return), it is inevitably pulled towards the singularity at the center of the black hole.

Referring to planets as "boys and girls" is a cultural or linguistic convention and not based on any scientific fact. Planets are celestial bodies with no gender. They are named according to astronomical traditions, mythology, or historical figures.

A planet that has an orbiting ring around it is saturn although there are many other planets with rings saturn has the largest ring!! Fun fact jupiter also has a ring but its to clear to see it in any pictures!

In our solar system, the outer planets, all referred to as gas giants, have no solid outer surface at all, their entire outer envelope is gas; any artifacts visible on them are attributed to local changes in composition or weather effects. Jupiter, Saturn, Uranus and Neptune are all believed to have relatively small solid rocky (silicate) cores, largely similar in composition to the inner planets. Note that due to extreme pressures there are phase changes, for example, on Jupiter there is a thick layer of metallic hydrogen around the core, then a layer of (supercritical) liquid hydrogen; this reflects the physical principle of the correlation of depth and pressure - moving outwards from the core you would note a gradual decrease or a gradient of pressure all the way out to a point where the distinction between the edge of the atmosphere and the beginning of empty space would blur somewhat.

Sunspots do not explode, sunspots are cooler regions of the Sun's surface caused by what are basically magnetic field "tangles" stopping the convection that brings heat to the solar surface. When the "tangle" untangles or snaps back the Sunspot fades away as that bit of the surface heats back up.

For explosions on the surface of the Sun, try looking up solar flares or corona.

The planets in our solar system are not always visible to an observer on Earth, for various reasons. Daylight reduces the visibility of planets significantly. Mercury and Venus, since they are inside the orbit of Earth (closer to the Sun), could only be seen in favorable conditions near sunset or sunrise and not in the middle of the night (or similar difficulties in solar transit, or other planets in opposition, close to the line of sight to the Sun). They would not be visible if occluded by a celestial body (or specifically if they are below the horizon). Neptune, being too distant, can't be resolved with the naked eye; exoplanets require sophisticated equipment to resolve.

In "Flash Trek: Broken Mirror," you can get forbidden from a planet by angering its inhabitants or committing crimes, such as attacking them or violating their laws. If you become forbidden from a planet, you will no longer be able to interact with its features or characters until certain conditions are met to lift the ban.

Yes, it is a common opening move for black in chess to pawn to L1, also known as moving the pawn to d7 and forming the pawn chain with the c7 pawn. This move can lead to various pawn structures and is often seen in the Sicilian Defense and Caro-Kann Defense openings.

There is no definitive evidence of viruses on other planets in our solar system or beyond. However, scientists are exploring the possibility of life in various forms, including the existence of viruses, on other planets and moons. Ongoing research and future missions may provide more insights into this question.

No, black holes do not have a smell because they are regions of space with such strong gravitational pulls that not even light can escape from them. Smell requires the presence of particles to be detected by our nose, which is not applicable to black holes.

Because of shielding of the atmosphere and Earth's magnetic field, cosmic rays have very little effect upon us, the average person receiving less than half a millisievert, although some sources report up to 2.5 mSv annually. The recommended maximum is about 1000; which is more likely to be encountered only by an astronaut on an extended mission. Negative effects on human tissue include DNA damage, cancer-like effects, or a kind of cataract, brain and neurological effects, and possibly acceleration of Alzheimer's. Some astronauts in the Apollo program reported seeing light flashes, which may have been related to cosmic ray collision with the retina, optic nerve, or visual cortex in the brain, but no permanent damage was expected to result.

No. There are others far larger and brighter. Just happens to be the closest.

The planet he comes from is classified as Asteroid B-612. it is barely larger than a house. Its only inhabitants are three small volcanoes (one is supposedly dormant), some plants called baobabs (not sure what those are) and a rose.

Physicists and astronomers are the experts in studying and understanding black holes. They have developed theories and models to describe the properties and behavior of black holes, such as their gravitational pull, event horizon, and how they form and evolve. These researchers continuously work to expand our knowledge and understanding of these enigmatic cosmic objects.

Yes. The (as yet hypothetical) Hawking radiation is due to pair production near the border (event horizon) of a black hole.

Yes. The (as yet hypothetical) Hawking radiation is due to pair production near the border (event horizon) of a black hole.

Yes. The (as yet hypothetical) Hawking radiation is due to pair production near the border (event horizon) of a black hole.

Yes. The (as yet hypothetical) Hawking radiation is due to pair production near the border (event horizon) of a black hole.