There are several techniques to detect cosmic rays, using devices of various configurations (some of which you can even make at home). One of the oldest is the cloud chamber, where cosmic rays travel through a chamber containing vapor near its condensation point; as the cosmic ray (which is a high energy particle) collides with vapor molecules it cause them to breifly condense info visible cloud-like trails. A bubble chamber uses a similar method, where a liquid is kept near its boiling point, and a stream of bubbles can be made visible as the particle travels through the liquid causing a line of bubbles to form where the additional energy pushes the liquid briefly above the boiling point. Another technique uses parallel high voltage plates (spark chambers) in which a small channel in the gas between the plates can become ionized in the path of the cosmic rays, causing a spark to travel between the plates making the path visible. Geiger counters, and scintillators use other techniques to detect cosmic rays.

According to the particle theory of light, light is made us of particles called photon. Black hole has very high gravity. Its escape velocity being more than that of speed of light, light is attracted towards it and it even cannot escape

by lunizah: black holes attract every thing even the light because they have a very strong attractive force and that's the reason why black holes attract light!! ^_^

We use Earth as a reference. 'A planet not composed mostly of silicate rocks' would likely be a gas planet, although one could imagine a planet consisting of mostly water ... a so-called "water world". Within our sloar system, we call these gas planets "Gas Giants", because in reference to earth they are all very large. The 4 Gas Giants in our solar system are Jupiter, Saturn, Uranus, and Neptune. Sometimes Uranus and Neptune are referred to as "Ice Giants" based on the chemistry of their outer atmospheres and their interior cores. See this link for some info on orbital periods, masses, densities, etc: http://www.solstation.com/stars/jovians.htm

Some theories state that if you enter a black hole at a certain trajectory you can exit via a white hole in another part of our universe or different universe. Other than this there is no escape from a black hole. Hawking radiation excepted.

Since black holes aren't directly visible, effects they cause have to be observed. For example, optical telescopes can detect gravitational lensing when distant objects such as galaxies emit light which bends around an intermediate object with intense gravity like a black hole. Optical telescopes can also see the powerful emissions from the relativistic polar jets powered by black holes. Telescopes sensitive to x-ray frequencies can detect the energy emitted by the accretion disk around the hole, and were historically used to locate and assist in verification of the presence of black holes; such happened in observations during the search for the first verification of the existence a black holes in the X-ray binary Cygnus X-1.

Depending on the mass of whatever is left over of a star, it can turn into a white dwarf, a neutron star, or - in the case of the most massive stars - a black hole.

No, Saturn is not the only planet with rings. Jupiter and Uranus also have rings, it is just easier to see the rings on Saturn.

It is believed that a black hole will slowly evaporate. But for a black hole that has the mass of a star, this will take much, much longer than the current age of the Universe.

By avoiding jumping up at the escape velocity.

The orbit of a celestial body is its revolution about its primary. It can be explained in terms of the net result of gravitational forces acting upon the body, usually with emphasis upon the gravitational force exerted by its primary, which accelerates the body towards it, causing the object and its primary to revolve around a common center of gravity. The characteristics of the orbit are determined by the momentum of the body (kinetic energy or momentum being vector quantities, the vector's argument oriented approximately perpendicular to a line joining the body to its primary, or tangential to a circular orbit) and the strength of the force; the shape of the orbit is ideally elliptical with the primary occupying a position at one of the foci - remembering that a circle is a special ellipse with the foci superimposed. Note that with eccentric elliptical orbits, the axis of the ellipse itself will precess slowly over time, a phenomenon explained through relativistic effects. In the context of relativity, an orbit can be explained as a straight line (geodesic) through curved space shaped by gravitation - giving rise to one description of the properties of an orbit being the development (unfolding or mapping) in three dimensions of a four dimensional path through timespace.

Australopithecus is the name of a species of hominids thought to have occupied eastern and southern Africa, becoming extinct about two million years ago. Paleontologists generally believe that they played a significant role in human evolution, particularly in brain development.

That means it might come true unless your like people that seen things before that didnt happen like me and if your not then it might not happen.

there is still no proper answer about the structure of a black hole,as because a black hole cant be seen.But according to assumptions the black hole spins around and thus its structure may be oval or spherical.Like anything thaat rotates, the black holes becomes flatter at the poles and broader at he equator

Gravity is the only one of the four forces responsible for black holes. This is because it is always attractive while the other three can be either attractive or repulsive. Enough mass in one place can always produce enough gravitational attraction to overcome any repulsion that could be produced by all the other three forces together.

Jupiter. Jupiter has a mass of 1.8986×1027 kg, 317.83 times the mass of earth.

Jupiter is massive enough to be used as a reference mass for describing the mass of the other outer planets of our solar system.

In April 2008 NASA discovered the smallest black hole ever. The black hole, called XTE J1650-500, is15 miles across. It is located in Ara, a constellation in the Milky Way Galaxy.

Black holes are created when a star of enormous mass goes through the supernova stage. The supernova has left an extremely dense core that soon collapses under its own gravitational pull. The gravity is so strong that nothing (yes, nothing, not even light) can escape from it. A black hole creates a huge disturbance in space and time which leads some scientists to believe when 2 blach holes join, a wormhole (in the link below) is made.

table 5 was here

When a star collapses all the gravity that it created also collapses creating a wrinkle, fold, hole (hard to explain) in the fabric of space time.

Black Holes are mostly located at Star's that have Died or Exploded from running out of heat or in which cases The Sun that hasent ran out of energy yet or other stars, you get what i'm saying

According to the Wikipedia article, there are different types of Cepheids; really, I think that each type should be investigated separately.For example, classical Cepheids have 4-20 times the mass of our Sun, and such stars are rare - 85-90% of all stars are less massive than our Sun. And not all such stars will automatically be Cepheids at any specific period of time.

I am not sure about the other types of Cepheids - whether they really ARE rare, or if they are, why. In fact, it would seem that nobody knows for sure - according to Wikipedia, article "Type II Cepheid", "The physical properties of all the type II Cepheid variables are very poorly known."

Because the Andromeda galaxy is so distant it is significantly difficult to identify planets in it - although there are likely hundreds of billions. Using a technique called gravitational microlensing, one planetary candidate within Andromeda has been announced by a team of scientists; the exoplanet is a stellar companion and thought to have about six or seven times the mass of Jupiter.

In the case of a star (that is not actually going nova or supernova) they are balanced.