Unanswered | Answered

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 itssurface.
First of all, there's two theories of relativity. The one on normalrelativity which indicates that an object that is moving very fastwill experience less time than one that is stable. The one onspecial relativity indicates that the more gravity an object isputted into, the less time it will suffer...
There is no real planet Krypton; nor an imaginary Krypton as itblew up as Kal Els parents flew him away to earth in a smallspaceship.
The planets in our solar system are not always visible to anobserver on Earth, for various reasons. Daylight reduces thevisibility of planets significantly. Mercury and Venus, since theyare inside the orbit of Earth (closer to the Sun), could only beseen in favorable conditions near sunset or...
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'sevent horizon is so extreme that the only possible direction ofmovement is further inward.
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 gasgiants, have no solid outer surface at all, their entire outerenvelope is gas; any artifacts visible on them are attributed tolocal changes in composition or weather effects. Jupiter, Saturn,Uranus and Neptune are all believed to have...
A planet that has an orbiting ring around it is saturn althoughthere are many other planets with rings saturn has the largestring!! Fun fact jupiter also has a ring but its to clear to see itin any pictures!
In our solar system, because of the lack of moderating effect of athick atmosphere, and its proximity to the Sun, the planet Mercuryhas 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...
Yes, probably many of them. We believe that there is a supermassive black hole at the center of the Milky Way galaxy; that there are probably similar suoermassive black holes at the centers of many large galaxies.
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.
No, the T Tauri star is not a giant star, in fact it is a medium-sized star. It is also a very cold star.
First, you got to understand something. A black hole is just as ablock of ice. The smaller it is the faster it melts. So speakingscientifically the black hole releases radiation relatively fasterwhen its smaller than when it's bigger, which heats up the deadstar. For that reason the black holes...
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...
Neil deGrasse Tyson is a well known African-Americanastrophysicist. He is the Frederick P. Rose Director of the HaydenPlanetarium at the Rose Center for Earth and Space.
The radiation emitted from a black hole is known as hawking radiation after it's discoverer Stephen Hawking.
The inner planets, also known as rocky or terrestrial planets, donot have significant ring systems.
In our solar system, Earth is the only planet with any significantamounts 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 tobeing considered an outer planet or gas giant. The term"terrestrial" means Earth-like.
In our solar system, the planet with the largest orbit is theoutermost planet - Neptune. Its orbit is over 14 billion km longand it takes about 165 years to complete.
First of all, there cannot be a black hole on the sun because it'sto small, but technically speaking a star which is massive enoughfor it's core to collapse and form a black hole will be a star thatis not alive any more but will still seem like a normal star foraround three hours, and the only way...
No, the celestial sphere is a notional entity which is basicallythe "background" of stars against which the Sun, planets, etc.,appear to move throughout the year. It is convenient forastronomical notation. The ancients used to believe there were somekind of spheres which stars and other celestial...
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 withthe lowest density, which is the planet's mass divided by itsvolume. In our solar system, Saturn is the least dense planet witha density of roughly 0.7 (water, by comparison, has a density of 1,or 1 gram per cubic centimeter). This is...
All massive objects in the solar system feel the gravitationalinfluence of their primary and most follow an orbital path aroundit - the majority of the mass orbiting the Sun, including planets,asteroids, comets, etc. A common orbital path, such as the planetsfollow, is shaped like an ellipse with...
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 thenight sky, and notes about their observation are consistent withall of recorded history. Some of the earliest known records arefrom Babylonians about 1600 BC.
Strictly speaking, no; stars are incandescent (light resulting fromheat) as opposed to luminscent (light resulting from non-thermalbased 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 appearoverwhelmingly black to an observer outside Earth. There is dust inthe solar system, mostly in the plane of the ecliptic, whichscatters small amounts of sunlight, and is sometimes visible fromEarth at night (zodiacal light, or Gegenschein)....
In astronomy there are a few definitions of year depending on whatexactly is being considered. Perhaps most commonly, the Julian yearis defined as 365.25 days. Additional definitions include thesidereal, anomalistic, vague, lunar, Gaussian, tropical, draconicyear and several others which vary...
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, adefinition of "top" would be needed - since the definition wouldthus have to include exoplanets discovered outside the solarsystem.
Mercury is the smallest planet in our solar system (in fact acouple moons are larger than it). It orbits closest to the Sun andmoves the fastest, having the shortest year at about 88 Earth days.Its mass is about six percent that of Earth. It has the mosteccentric orbit. It has almost no atmosphere,...
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 ...
Generally true, planets don't emit their own light, but are visiblelargely because of reflected light, the illumination provided bytheir star, in the case of our solar system, by the Sun. Someplanets might produce trivial amounts of light by other means, forexample from lightning, volcanism, mineral...
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 setin the west; the reverse would be true on Venus, which orbits'upside-down' (retrograde motion) with the sun rising in the westand setting in the east (and would seem...
The planet Mercury is named after the Roman messenger god, which isentirely appropriate considering the planet orbits closest to theSun and is thus the fastest moving. The planet's composition is notbelieved to have significant quantities of mercury (the element).
The largest bodies of liquid water on planet Earth are calledoceans, the biggest of which is the Pacific ocean. The Pacificcontains about 170 million cubic miles of water, which is estimatedto 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 fact, black holes cannot be directly viewed. They can only belocated by seeing how much radiation is coming from a certain pointin space. The black holes cannot be viewed directly because theyabsorb the electromagnetic radiation that goes near them.
None of the planets we know have a complete snow covering; Earthhas only a partial and seasonal snow covering for only a fractionof its land area. Saturn's moon Enceladus (which is not a planet)comes close as it is known to have water geysers because ofsubsurface liquid water - some of which water...
A place for observing stars and planets is usually called anobservatory.
Because of the immense mass of the Sun it doesn't really do muchmovement and couldn't be said to move around the solar system. Theplanets, however, do orbit around it (or more correctly, around acommon center of mass with the Sun) as do most asteroids, minorplanets, comets, etc.
Conditions on Mercury are far too harsh for the kinds of life weare familiar with. It is far too hot in the day, too cold at night,has no liquid surface water, and almost entirely lacks anatmosphere.
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 tohave surface liquid water in any considerable amount. Some planetsare known to have water ice or atmospheric water vapor; some moonsof Saturn and Jupiter (which are not planets) show evidence ofhaving sub-surface oceans of liquid...
Light is not only attracted to a black hole, in fact, its attractedto you, to me and to everything made of matter in the universe. Theproblem is that light is affected by gravity, and the black holeshave so much that light significantly change trajectory or theblack holes absorb the photons
The large outer planets, particularly Jupiter, are believed to actas giant gravitational "vacuum cleaners" or shields to absorb ordeflect objects which might result in dangerous impacts with Earth.Despite this, there is abundant evidence of meteorite impacts onEarth's surface, although these can get...
The "no-hair" theorem states that black holes have only threeproperties for an outside observer: charge, mass, and spin. Inother words, given two black holes with these three propertiesbeing identical, no other information could be obtained to tellthem apart - for example, whether one had been made...
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 asupernova, but in a little over five billion years it will swell upin size as a red giant and consume the inner planets, possiblylarge enough to include Earth.
A planet rotates (spins) about its own axis, giving rise to itsday. Earth's day is about 24 hours. This motion is distinct fromthe orbital motion (revolution about the Sun) which is the planet'syear.
Traveling at the speed of light, it would take roughly ten millionEarth days (about 27,000 years plus or minus a thousand years) toreach the supermassive black hole at the Milky Way's core.
Gravitation answers to a description in Einstein's general theoryin which spacetime itself is curved by the effects of gravity; theinfluence of gravity is such that planets tend towards an ideallyspherical shape; although all known planets have a slightequatorial bulge (spherically oblate shape) due...
The USSR launched the Venera series to study the planet Venus, theVenera 7 probe being the first spacecraft to make a controlledlanding 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 aperiod (day) of about 24 hours, and a revolution (year) about acommon center of gravity with its primary, the Sun, which takesabout 365 days. The orbit is a slightly elongated (loweccentricity) ellipse with the Sun near one of the...
Titan and Ganymede are both larger (but less massive) than Mercuryand could certainly be called planets if they qualified under theIAU criteria. The conditions include a requirement that they orbitthe Sun, and not Saturn or Jupiter, respectively, which currentlymake them moons, not true planets....
It depends on what you're studying besides black holes. If you're studying planets along with black holes, you could be an astrophysicist. Or, if you're studying atoms along with black holes, you could be a theoretical physicist. Just a few examples.
Although there were several thinkers which proposed something likethe heliocentric model before him, Copernicus is identified mostwith the idea; and it took his name, the Copernican system,contrasting with the geocentric model that identified Earth as thecenter, known as the Ptolemaic model.
Although the problem of classification of newly discovered bodiesdates back some years earlier, it was not until August 2006 whenthe IAU came up with a more strict definition of 'planet'. Therequirement which disqualified Pluto and reclassified it as a dwarfor minor planet, was that it had not...
Geologist and philosopher John Michell proposed their existence ina paper written in 1783. He realized a star might be so massivethat light would not escape, and called them "dark stars." It waslater in early 20th century when they received more interest as aconsequence of Einstein's general...
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 tothe speed of light. Outside the event horizon it would decreasewith increasing distance away from the black hole per the inversesquare rule; inside the event horizon it is thought to exceed thespeed of light; thus nothing can escape.
In point of fact, the actual volume and density of a black hole must be determined indirectly, working back from the Schwarzschild radius for the estimated diameter of the black hole's event horizon. There is also the consideration that the center of a black hole can be thought of as near infinite...
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 trueplanet to dwarf or minor planet status in 2006; it is highlyunlikely to reverse that decision and change the definition back toinclude 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.
Don't go near it. Once you are within the event horizon, there is no hope. In fact you would be dead long before crossing the event horizon. Tidal forces would have turned you and your vehicle into a kind of space spaghetti.
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, theeighth hottest would actually be the coldest - which is Uranus. Itis believed to be colder than Neptune, despite the latter beingfurther from the Sun, because of a mechanism which is thought tohave dissipated the core heat into space.
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...