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Astrophysics

Parent Category: Cosmology
Astrophysics is the scientific discipline concerned with the events that are taking place on the grandest of stages; the universe. Questions about the formation and evolution of the planets, solar systems, stars, and galaxies found within the universe, as well as questions regarding black holes, cosmic rays, particle and nuclear astrophysics, nucleosynthesis, and magnetohydrodynamics should be directed here.
try to get your enemies planet pristeige below -1000% then the planet label will turn yellow, therby showing you are forbidden from that system.
The Earth is. It has all these things crawling and moving near its  surface.
First of all, there's two theories of relativity. The one on normal  relativity which indicates that an object that is moving very fast  will experience less time than one that is stable. The one on  special relativity indicates that the more gravity an object is  putted into, the less time it...
There is no real planet Krypton; nor an imaginary Krypton as it  blew up as Kal Els parents flew him away to earth in a small  spaceship.
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...
Because it does not have enough mass to crush itself with it's gravity.
Nothing. The distortion of space and time within a black hole's  event horizon is so extreme that the only possible direction of  movement is further inward.
Sure, if it gets close enough, it might. By the way, any other object of sufficient mass could also "suck" the Sun if it gets close enough.\n Sure, if it gets close enough, it might. By the way, any other object of sufficient mass could also "suck" the Sun if it gets close enough.\n Sure, if it...
A planet is too large to sit on a moon.
What you are seeing is an absence of light. You distinguish a black objects presence by its lack relative to other things.
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....
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...
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, because of the lack of moderating effect of a  thick atmosphere, and its proximity to the Sun, the planet Mercury  has the largest temperature range between the day and night sides.  The side facing the sun gets as hot as 430 C, the side facing away,  as low as -173 C.
not every star can turn into a black hole, because it has to meet a certain size to do so. our sun will not turn into a black hole, how ever, it will destroy our planets. many stars can turn into black holes, but only when it meets the end of its life which is when it stops burning gas.stars have to...
The planets are boys and girls because they were named after some important people.
No they do not. All matter in a black hole is crushed into a single point called a singularity. A point does not have any dimensions so there is no bottom. Or even a top for that matter.
Planet Earth has a radius of about 3,960 miles.
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...
Simple. We die a brutal and painful death.
The names of moons Titan, Tethys, Titania start with "t".
A black hole consists of three main parts: The Accretion disk, (outer edge made up of hot gasses/rock etc). The event horizon (the part that looks as though it it a huge black hole, this is because the parts moving into it are moving faster than the speed of light so you cannot see the past this...
Neil deGrasse Tyson is a well known African-American  astrophysicist. He is the Frederick P. Rose Director of the Hayden  Planetarium at the Rose Center for Earth and Space.
The inner planets, also known as rocky or terrestrial planets, do  not have significant ring systems.
In our solar system, Earth is the only planet with any significant  amounts of surface water (and land).
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...
go to http://www.uscollegesearch.org/astrophysics-colleges.html and there's a huge list of good colleges if you want to go into astrophysics.
The Earth is terrestrial, inner, or a "rocky" planet, as opposed to  being considered an outer planet or gas giant. The term  "terrestrial" means Earth-like.
In our solar system, the planet with the largest orbit is the  outermost planet - Neptune. Its orbit is over 14 billion km long  and it takes about 165 years to complete.
First of all, there cannot be a black hole on the sun because it's  to small, but technically speaking a star which is massive enough  for it's core to collapse and form a black hole will be a star that  is not alive any more but will still seem like a normal star for  around three hours, and...
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...
The Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro, New Mexico is credited with discovering the asteroid, Biyo, on May 22, 1998. The asteroid was named after the teacher, Dr. Josette Biyo.
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...
All massive objects in the solar system feel the gravitational  influence of their primary and most follow an orbital path around  it - the majority of the mass orbiting the Sun, including planets,  asteroids, comets, etc. A common orbital path, such as the planets  follow, is shaped like an...
yes it is formal because it doesnt use slang and too much puncuation the lonely planet guide does use puncuation but not too much unlike the email
Planets (other than Earth) are visible to the naked eye in the  night sky, and notes about their observation are consistent with  all of recorded history. Some of the earliest known records are  from Babylonians about 1600 BC.
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.
Just an another random volunteer I guess.
The solar system, which is largely empty space, would appear  overwhelmingly black to an observer outside Earth. There is dust in  the solar system, mostly in the plane of the ecliptic, which  scatters small amounts of sunlight, and is sometimes visible from  Earth at night (zodiacal light, or...
In astronomy there are a few definitions of year depending on what  exactly is being considered. Perhaps most commonly, the Julian year  is defined as 365.25 days. Additional definitions include the  sidereal, anomalistic, vague, lunar, Gaussian, tropical, draconic  year and several others which...
Firstly you get streched then you rip into two then 4 then 10 and you keep doing that until you are a stream of atoms then you get squished and then get burnt up. CAUSE OF THE FREAKIN FCC!Oh yeah that will feel good if you get sucked into a blackhole.
Because there are only eight planets in our solar system, a  definition of "top" would be needed - since the definition would  thus have to include exoplanets discovered outside the solar  system.
Mercury is the smallest planet in our solar system (in fact a  couple moons are larger than it). It orbits closest to the Sun and  moves the fastest, having the shortest year at about 88 Earth days.  Its mass is about six percent that of Earth. It has the most  eccentric orbit. It has almost no...
It could be noted that the tidal force near most black holes wouldstretch you to death ("spaghettify") ... but that the larger andmore massive the black hole, the less you'd feel this tidal force.In the unlikely event you could get to a large enough black hole,could survive the intense radiation...
[color=#FF0000][b]Sacrosanct, the Celestial Entity[/b][/color] model would be the priest with bright light coming out of it (more like a combination of a priest and a wisp) sorry i cant find any... Story: will furnished upon request... don't have enough time. Movespeed :300 Range :600 Armor :2 ...
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,...
It depends on the planet and the observer's position on the planet.  Most observers on Earth would note the Sun rise in the east and set  in the west; the reverse would be true on Venus, which orbits  'upside-down' (retrograde motion) with the sun rising in the west  and setting in the east (and...
The planet Mercury is named after the Roman messenger god, which is  entirely appropriate considering the planet orbits closest to the  Sun and is thus the fastest moving. The planet's composition is not  believed to have significant quantities of mercury (the element).
The largest bodies of liquid water on planet Earth are called  oceans, the biggest of which is the Pacific ocean. The Pacific  contains about 170 million cubic miles of water, which is estimated  to be roughly half of all the water in Earth's oceans.
To be quite plain, no mater cannot escape a black hole. Not even light its self can escape the gravitational pull of a black hole.*more info*Black holes are created when a massive star (about 3-4 times the size of our sun) explode and create a supernovae. The stare will then implode on its self...
Scientists "see" things through specialized equipment that identify waves that are invisible to a human eye i.e. microwaves, gamma waves, etc.   Also because we are in the Milky Way, right? SO There are many stars in our galaxy. So, they can see it because it was a big black gap right in our...
Yes, NASA has sent a couple of unmanned probes to examine Mercury,  Mariner 10 which did a flyby and the MESSENGER orbiter.
In our solar system the outer planets Jupiter, Saturn, Uranus and  Neptune are mostly gas, hence their identification as "gas giants."
In fact, black holes cannot be directly viewed. They can only be  located by seeing how much radiation is coming from a certain point  in space. The black holes cannot be viewed directly because they  absorb the electromagnetic radiation that goes near them.
None of the planets we know have a complete snow covering; Earth  has only a partial and seasonal snow covering for only a fraction  of its land area. Saturn's moon Enceladus (which is not a planet)  comes close as it is known to have water geysers because of  subsurface liquid water - some of...
A place for observing stars and planets is usually called an  observatory.
Because of the immense mass of the Sun it doesn't really do much  movement and couldn't be said to move around the solar system. The  planets, however, do orbit around it (or more correctly, around a  common center of mass with the Sun) as do most asteroids, minor  planets, comets, etc.
Conditions on Mercury are far too harsh for the kinds of life we  are familiar with. It is far too hot in the day, too cold at night,  has no liquid surface water, and almost entirely lacks an  atmosphere.
Black holes,were theorized since the 1800's,it was predicted byEinstein's theory that they were really real.Since then this forcedastronomers to think such a thing is real,and yet they are,butthere very rare to find,so we don't really know what telescopediscovered a black hole.So we thing the Hubble...
None of the planets in our solar system except Earth are thought to  have surface liquid water in any considerable amount. Some planets  are known to have water ice or atmospheric water vapor; some moons  of Saturn and Jupiter (which are not planets) show evidence of  having sub-surface oceans...
Light is not only attracted to a black hole, in fact, its attracted  to you, to me and to everything made of matter in the universe. The  problem is that light is affected by gravity, and the black holes  have so much that light significantly change trajectory or the  black holes absorb the...
The large outer planets, particularly Jupiter, are believed to act  as giant gravitational "vacuum cleaners" or shields to absorb or  deflect objects which might result in dangerous impacts with Earth.  Despite this, there is abundant evidence of meteorite impacts on  Earth's surface, although...
The "no-hair" theorem states that black holes have only three  properties for an outside observer: charge, mass, and spin. In  other words, given two black holes with these three properties  being identical, no other information could be obtained to tell  them apart - for example, whether one...
We have never actually been able to stick a thermometer in one so this questing is a Little hard to answer with a any reliable reply.
yes, there is actually a giant black hole in the center of our galaxy, but don't worry because we are safely orbiting around it. A black hole is basically really really really dense material, which forms a blob where the gravitational pull is so stong nothing can escape it, not even light. It can...
Our Sun isn't calculated to have enough mass to explode as a  supernova, but in a little over five billion years it will swell up  in size as a red giant and consume the inner planets, possibly  large enough to include Earth.
A planet rotates (spins) about its own axis, giving rise to its  day. Earth's day is about 24 hours. This motion is distinct from  the orbital motion (revolution about the Sun) which is the planet's  year.
Traveling at the speed of light, it would take roughly ten million  Earth days (about 27,000 years plus or minus a thousand years) to  reach the supermassive black hole at the Milky Way's core.
Gravitation answers to a description in Einstein's general theory  in which spacetime itself is curved by the effects of gravity; the  influence of gravity is such that planets tend towards an ideally  spherical shape; although all known planets have a slight  equatorial bulge (spherically...
The USSR launched the Venera series to study the planet Venus, the  Venera 7 probe being the first spacecraft to make a controlled  landing on another planet.
They do the opposite, they stretch you.
Doppler spectroscopy is one method ; below are several links to information regarding how new planets are discovered or inferred .
Cosmic rays are a bit of a misnomer since they are actually high energy particles like protons or alpha particles traveling at relativistic speeds (matter), not electromagnetic radiation (energy), so they don't have a canonical frequency range such as, for example, visible light, x-rays, gamma rays,...
Queen's University was founded on October 16, 1841.
there really is no way of knowing for sure at least not with thetechnology we have now but there are a lot of theories ranging frommassive seismic events like earthquakes and volcanic eruptions allthe way to releasing demons from hell.
Earth's main movements include a daily axial rotation (spin) with a  period (day) of about 24 hours, and a revolution (year) about a  common center of gravity with its primary, the Sun, which takes  about 365 days. The orbit is a slightly elongated (low  eccentricity) ellipse with the Sun near...
Titan and Ganymede are both larger (but less massive) than Mercury  and could certainly be called planets if they qualified under the  IAU criteria. The conditions include a requirement that they orbit  the Sun, and not Saturn or Jupiter, respectively, which currently  make them moons, not true...
Although there were several thinkers which proposed something like  the heliocentric model before him, Copernicus is identified most  with the idea; and it took his name, the Copernican system,  contrasting with the geocentric model that identified Earth as the  center, known as the Ptolemaic...
Although the problem of classification of newly discovered bodies  dates back some years earlier, it was not until August 2006 when  the IAU came up with a more strict definition of 'planet'. The  requirement which disqualified Pluto and reclassified it as a dwarf  or minor planet, was that it...
Geologist and philosopher John Michell proposed their existence in  a paper written in 1783. He realized a star might be so massive  that light would not escape, and called them "dark stars." It was  later in early 20th century when they received more interest as a  consequence of Einstein's...
because with out the planet we wont be alive
They don't "lead" anywhere. Any mass that falls into the black hole stays in the black hole. There is a theory that, in the case of rotating black holes, matter may emerge elsewhere from a "white hole".It's an idea that remains controversial and highly speculative.
At the event horizon, theory holds that escape velocity is equal to  the speed of light. Outside the event horizon it would decrease  with increasing distance away from the black hole per the inverse  square rule; inside the event horizon it is thought to exceed the  speed of light; thus nothing...
Singularity, where all matter is crushed to a point of the same density but zero volume and takes up zero space.
The International Astronomical Union "demoted" Pluto from true  planet to dwarf or minor planet status in 2006; it is highly  unlikely to reverse that decision and change the definition back to  include Pluto as a planet in 2015.
No one discovered it. It is still not known for sure if a supermassive black hole does exist at the centre of our Galaxy.
The answer for this is your butt think of It stop looking online and start using your brain
Since we now have only eight planets in our solar system, the  eighth hottest would actually be the coldest - which is Uranus. It  is believed to be colder than Neptune, despite the latter being  further from the Sun, because of a mechanism which is thought to  have dissipated the core heat into...
You can't really "make" a black hole, but you can do research, present on the research and do a small demonstration of one of the properties of a black hole.For example, there are lots of experiments you can set up to measure the force of attraction between two objects. You can use that as a launch...
Figure it out yourself you lazy bum
No. Only the the most massive stars become black holes. The vast  majority of stars, up to about 8 to 10 times the mass of the sun  form a dense remnant called a white dwarf. Stars between 10 and 25  and perhaps up to 40 times the mass of the sun form a denser  remnant called a neutron star....