Astrophysics

There is a certian distance from a black hole that is better known as the Schwartzchild radius. At this distance, light can actually orbit the black hole, and if you were passing through that zone, you may be able to see the back of your own head. You probably will not see the back of your own head for a variety of reasons, but theoretically, it is possible.

In our solar system, the planets Mercury and Venus orbit at a distance less than 1 AU. Since the Earth orbits at an "average" distance of one astronomical unit, you might also argue that Earth, owing to orbital eccentricity, sometimes is closer to the Sun than one AU.

No one knows where cosmic rays come from otherwise they would not be given a generic term. They would be identified according to a particular star or galaxy. That said, cosmic rays come in a variety of energies and a variety of directions. As a result, it is suspected they have a number of different sources. They can come from galaxies all over the universe.

Every now and then, the temperature inside of a large star ceases to be hot enough to hold the atoms apart against the force of gravity. The inside of the star collapses creating a black hole. Once the collapse reaches a certain point as determined by the mass of the star and section 4 of the Theory of Relativity, the rest of the star explodes and the matter is sent flying into space at slightly less than the speed of light.

The black hole is now spinning at tremendous speed. If a star is close, materials will be ripped from its surface. Some atoms will fall into the black hole. They will give some of their energy to other atoms which will be thrown into space at almost the speed of light. They provide another source of Cosmic rays.

Some stars lose material to neutron stars. When the material falls on the surface of a neutron star, some of it takes part in a nuclear explosion. Other is simply blown off into space.

Stars, like the sun, rotate on their axis. They constantly lose material off into space in their polar regions. That becomes cosmic rays.

Thus, cosmic rays come from all over the universe and from a variety of sources.

A magnetic field is not really made of any matter, but is more a zone or region of the influence of a magnet or movement of an electric charge. The reason something charged or magnetized passing through a magnetic field will feel a force is explained by the exchange of force carriers (with the electromagnic force, these are photons).

The Earth's magnetic field for example is thought to be created by the motion, including convection and spin, of liquid metal, mostly iron alloys, in the outer core, acting like a dynamo.

Jupiter, Saturn, Uranus, and Neptune are gas giants. They are called that because they are primarily composed of gases like hydrogen, helium, and traces of other elements. These planets have no solid surface and their atmospheres can be thousands of kilometers deep.

Cosmic rays are high-energy particles originating outside Earth's atmosphere, including protons, electrons, and atomic nuclei. Visible light encompasses the wavelength range of electromagnetic radiation that is visible to the human eye, typically between 400-700 nanometers. Cosmic rays far exceed the energy levels of visible light and are not part of this electromagnetic spectrum.

In our solar system, the planet with the largest moon is Jupiter.. its moon Ganymede is larger than Mercury.

No, the black hole at the north pole will not kill us all. Black holes are typically formed from the collapse of massive stars and are not known to be present in our solar system. The nearest black hole is many light-years away and poses no immediate threat to Earth.

Uranus spins horizontally on its axis, meaning it rotates on its side compared to the other planets in our solar system. This unique tilt causes Uranus to have extreme seasons, with each pole experiencing 42 years of continuous sunlight followed by darkness.

The center. just a theory its really hard to say things about a black hole because we know so little about them other than they are made from supernovas and have an intence gravitational pull and consume everything around it and its so dence not even light can escape it (thus the name black hole)

A quasar is a very energetic distant object that is powered by a supermassive black hole at its center. The intense radiation emitted from the accretion disk around the black hole can outshine the entire galaxy in which the quasar is located.

The celestial coordinates of Sirius are:

Right Ascension: 6h 45m 09s

Declination: -16° 42' 58''

The distance from the sun affects a planet's climate primarily by influencing the amount of solar energy received. Planets closer to the sun receive more energy, leading to higher temperatures, while planets farther away receive less energy, resulting in colder temperatures. This can affect factors such as the presence of liquid water and the overall habitability of a planet.

Crossing the event horizon of a black hole would be absolutely possible if the hole was large enough not to have significant tidal force which tends to "spaghettify" any object approaching a smaller black hole. The more massive the black hole, the gentler the tidal force; for a smaller one, tidal force would stretch a person beyond hope of survival. Of course, this presumes the astronaut in question would have avoided the intense heat of any accretion disk, hazards of other infalling matter, intense radiation of relativistic-speed polar jets, etc.

Subjectively, it's been suggested that a person falling into a large black hole may not even be aware they've crossed the event horizon.

well not that much they both spin and that's about it....wat different is that a tornado is sucking in air instead of a black hole it has emense gravity and what goes in a black hole is never seen again and with a tornado is just comes out is maybe a different form (morebeat up)

Most of the mass of our solar system is located in the sun, which accounts for over 99% of the total mass. The remaining mass is distributed among the planets, moons, asteroids, and other celestial bodies in the solar system.

The celestial objects that appear to move backwards among the stars are planets in our solar system. This phenomenon is called retrograde motion and is an apparent backward motion that occurs when Earth passes by these planets in their orbits.

The Earth's magnetic field acts as a shield, deflecting charged particles (cosmic rays) away from the surface. This helps reduce the intensity of cosmic rays reaching the Earth's surface. However, cosmic rays can still penetrate the atmosphere at higher latitudes where the magnetic field is weaker.

Its quite possible that when Betelgeuse goes supernova (within a short "astronomical" time scale) that the remaining core will have enough mass to become a black hole. When it does, it will become the most studied "star" in our lifetime.

Since 1973 there have been several flyby missions many with objectives including gathering data about Jupiter, its moons, mass, radiation environment, etc. In order, Pioneer 10, Pioneer 11, Voyager 1, Voyager 2, Ulysses, Cassini, and New Horizons. To date the only probe to orbit the planet has been the Galileo orbiter which arrived in 1995, which also sent an atmospheric probe. Another probe Juno, launched in 2011, is expected to enter Jupiter polar orbit in 2016; the ESA has scheduled a further mission JUICE scheduled for 2022. Because of the possibility of life, there is significant interest in some of the Jovian moons.

Detailed descriptions of the above missions are available from various sources on the internet.

Saturn is the planet that is believed to have helium rain in its interior. It is thought that in Saturn's atmosphere, helium can condense into droplets and fall towards the planet's core due to the immense pressure and temperature conditions.

Cosmic rays are not part of the electromagnetic spectrum. They are high-energy particles, such as protons and atomic nuclei, that travel through space at nearly the speed of light. Unlike electromagnetic waves, which are composed of oscillating electric and magnetic fields, cosmic rays are actual particles with mass.

Pluto was reclassified as a dwarf or minor planet in 2006 by the IAU because it failed to meet one of three criteria agreed on as characteristics of a true planet: it must be in solar orbit (which would exclude moons), it must be in hydrostatic equilibrium (or a rounded shape, which might eliminate many small, irregular-shaped asteroids), and it must have cleared a significant fraction of its orbit. Pluto failed to qualify under this last stipulation.

Hawking proposed that black holes would interact thermodynamically with the universe in specific ways; for example that radiation could be generated by quantum effects near the event horizon (Hawking radiation) and thus carry mass away from it, per Einstein's proof of the equivalency of mass and energy; thus a black hole's mass could decrease over time and eventually it could "evaporate" entirely.

Our solar system has eight known planets. Before 2006 the system was considered to have nine; Pluto got demoted to a minor or dwarf planet.