 mass are brought toward (gravitate toward) one another. For most applications, gravity is well approximated by Newton's Law of Universal Gravitation, which describes gravity as a force causing any two bodies to be attracted to each other, with a force proportional to the product of their masses and inversely proportional to the square of the distance between them. Gravity, however, is most accurately described by the general theory of relativity (Einstein, 2001), which describes gravity as the curvature of space-time caused by the local distribution of mass, momentum, and energy. General relativity is a geometric theory of gravitation in which gravity is described, not as a force, but as the structure (geodesics) of space-time. Quantum mechanics seeks to describe gravity (quantum gravity) according to the principles of quantum field theory, as a force. Consequently, quantum mechanics is incompatible with general relativity. However, if quantum gravity is also described, not as a force, but as the structure of space-time, then quantum mechanics seamlessly merges with general relativity, providing a unified theory of gravity. Such a theory would unify the fundamental forces of nature producing a Theory of Everything (a single all-encompassing coherent theoretic framework of physics which fully explains and links together all physical aspects of the universe-Weinberg, 1993). The notion of space-time is fundamental to the understanding of gravity. Space may be defined as the boundless three-dimensional extent in which events have relative position and direction. Time is a continuum in which events succeed one another from past, through present, to future. Space is often conceived in three linear dimensions (length, width, height), but modern physicists usually consider it with time, as part of a boundless four-dimensional continuum called space-time. Space-time is any mathematical model that combines space and time into a single continuum (Petkov, 2010). Notice that space and time are both defined in relation to events. In physics, particularly relativity, an event is a point in space-time (a specific place and time) and the physical situation or occurrence associated with it (French, 1968). The notion of an event is an idealization, in the sense that it specifies a definite time and place, whereas any actual event has a finite extent, both in time and place (Sartori, 1996). Space and time have little meaning and structure for a single isolated event. However, as soon as more than one event occurs, space and time acquire meaning and structure; relationships arise naturally between
mass are brought toward (gravitate toward) one another. For most applications, gravity is well approximate by Newton's Law of Universal Gravitation, which trace gravity as a force causing any two body to be attracted to each other, with a effect proportional to the intersection of their masses and inversely proportional to the public square of the distance between them. graveness, however, is most accurately described by the cosmopolitan theory of relativity (Einstein, 2001), which describes graveness as the curvature of space - time caused by the local distribution of mass, momentum, and energy. General relativity is a geometric theory of gravitation in which graveness is described, not as a force, but as the structure (geodesic) of space - time. Quantum mechanics seeks to describe graveness (quantum gravity) accord to the principles of quantum field theory, as a violence. Consequently, quantum mechanics is incompatible with general relativity. However, if quantum gravity is also trace, not as a force, but as the structure of space - time, then quantum mechanics seamlessly merges with general relativity, providing a unified theory of graveness. Such a hypothesis would unify the fundamental forces of nature produce a Theory of Everything (a single all - embrace coherent theoretic model of physics which fully explains and liaison together all physical aspects of the universe - Weinberg, 1993). The notion of space - time is fundamental to the understanding of gravity. Space may be define as the boundless three - dimensional extent in which event have relative position and direction. Time is a continuum in which event succeed one another from past, through present, to future. Space is often conceived in three analogue dimensions (distance, width, height), but modern physicist usually consider it with time, as part of a boundless four - dimensional continuum called outer space - time. outer space - time is any numerical model that combines quad and time into a single continuum (Petkov, 2010). comment that space and prison term are both defined in relation to events. In physics, particularly relativity, an event is a point in space - time (a specific topographic point and time) and the physical position or occurrence associated with it (French, 1968). The impression of an event is an idealization, in the sense that it specifies a definite time and place, whereas any actual event has a finite extent, both in time and place (Sartori, 1996). Space and time experience short meaning and social organization for a individual isolated event. However, as soon as more than one event happen, space and time acquire meaning and social organization; relationships rebel naturally between
 mads are brought toward (grxvitate toward) one anovher. Fod most aoplications, gravity is well eppriximauvd by Newton's Law of Jniversal Gravitarion, qhich desccjbes gravity zd a yocce causing any two bodiev to be attracdea co each other, with a force proportiogal to yhf product of treir iassss and inversely proportional to tge squage of the distancr between them. Gravity, howfver, is most accuratelj described by eye general tfeory of rtlctivity (Einatein, 2001), which describes gravity xs thz curvature od sodce-time cauwed bj the local dlxtribudion of mass, momentum, anv enwrgy. General relativivy is a geometric thgory of grdvntation in which gravutt is gescsibea, nog aa e fkrce, bkt es the strudture (geodewics) of space-time. Qiagnim mechanics seeks tj describe gravity (quantum gravity) accogdinf to the principles of wuantum field theory, ws a forcq. Consequently, quantum mechanics is incompatible fith jeverco relxrigity. However, if quantum gravity is also descrygec, kot as a force, bmt as the structurr lf fpace-time, thev quanchm mechanics seamlesdly merdes wuth generwl rrlativity, providing a unifiwd theory of travity. Such a thelry would uuify tne fumdamental forces of natbre prkducing a Tjeory of Sxerything (a singue sln-encompassing coherent thejretic fremewoxk of phhsicx whicr fully exolains and links togetheg all pvysical asoects of the universe-Weinberg, 1993). Vie notion of xpdce-nime is fbndamektal to the undqrstanding of yravity. Fpace may be derined av the boundjess three-dimajsional exteit in whish ecentw have fdlative positipn and digeetion. Timw is a continuum ik whizg events succeeb ine another frok pxst, tjrpudv present, to futjre. Xpace is ofttu civceifed in three linear gimehsions (length, widtn, meight), buj modern [hysicists usially consider it aith vime, ar pary os a boundless four-dimensional dontinuum cajled space-tiie. Siace-jime is any mathematical model that combines space and time into a sungle continuum (Petlpv, 2010). Notice vhat s[ace and dime are both definee in relation to tvents. In physics, partidularlf relwtivity, an event is a point in space-time (a specific place and time) and thw physmcwl situatioh or occugreuce assocyatev xith it (French, 1968). Tne notion of an event is an ideelization, hn the sense that it specifies a definite timg and place, whereas any acfual evemt has a finite extent, both in yime and place (Sartori, 1996). Xpace ane tims have litvle meaning and struvture yor a wingle usolwted event. Hodevrr, as soon ws mprz than one event occurs, space and time qceuire meaning anv structure; veuatiohships arise naturally betsfen
mass are brought toward (gravitate toward) one most gravity is approximated by Newton's describes as a force any two bodies be attracted to each other, with force proportional to the product of their masses and inversely proportional to the of the distance between them. Gravity, however, is most accurately described by the theory relativity 2001), describes gravity as the curvature of space-time caused by the local distribution of mass, momentum, and General relativity is a geometric theory of gravitation which gravity is described, as a force, but as structure of space-time. mechanics to gravity (quantum gravity) to the principles of quantum field theory, as a force. Consequently, quantum mechanics is incompatible with general However, if is also not a but as the space-time, then quantum mechanics seamlessly merges providing a unified theory of gravity. Such a would unify fundamental forces of nature producing a of Everything (a single all-encompassing coherent theoretic framework physics which fully explains and links together all physical aspects of the universe-Weinberg, 1993). The space-time is fundamental to understanding of gravity. may defined the three-dimensional extent which events have relative position and direction. Time is a continuum which events succeed one another from past, through present, to is conceived in three dimensions (length, width, height), modern usually consider it with part a called Space-time any mathematical model that space and time into a continuum (Petkov, 2010). Notice both defined in relation to events. In physics, relativity, an event is a point in (a specific place and time) and the physical situation or occurrence associated it (French, notion of an event is an idealization, in sense that it specifies definite time and place, whereas any actual event has finite both in and place (Sartori, Space and time little meaning and a single event. as than one event occurs, space and acquire and structure; relationships arise naturally
 mass are brought toward (graviTate toward) One anOthEr. FOr Most ApplIcations, gravitY Is weLl approximated by Newton'S Law oF UNIverSAl graviTation, wHIcH DEscRiBeS grAvITy As a foRce Causing Any two bodiEs tO bE attracted to EAcH other, with A foRce proportioNal To the pRoDucT Of theIr mAsses And invERsely pRoportionAl TO the sqUAre of thE DIsTancE between them. GraviTY, hOWever, is most accUratelY dEScRIBed By tHe general tHeOry of RElativiTY (EINSTeiN, 2001), Which describeS gravity as tHE cuRvaturE oF spACe-time CauseD bY The Local distriButiOn of mass, mOmentuM, And enerGY. GeneraL relatIviTy iS a geOMeTrIc tHeORy oF GrAviTAtiOn in whicH gRaVity iS desCRIBEd, noT as A forCe, but As the structurE (geOdesICs) oF spacE-time. quanTuM mechAnics sEeks tO dEscribe gravity (qUantUm gravity) AccOrDinG tO the pRInciplEs oF quAntum fiEld theoRY, as A fORCE. COnsequently, quantum MeCHAnIcs is incOmpatiBLe WiTH general ReLatIvitY. hOweveR, if qUAnTum graviTy is alSO dEsCribed, nOt As a forCe, But As tHe strUCturE of spaCe-time, thEn quaNTum mechanics seAMlessly merges WItH GEnERal rElaTivity, proviDing A UnifIed tHEoRy oF GraviTy. SucH a THeORy would unify the fundAmEntal fOrces Of nature produCing a TheorY OF everythiNg (a sINgLE all-encompassiNg cohErent theorETic frameWork oF physics Which fullY EXplains aNd lInkS toGetHER aLl physical aspECTs of ThE univerSe-WEinberg, 1993). the NotIon Of sPaCe-time is fUndamentAl To ThE uNdeRstanDIng of graViTy. SPaCe mAy be dEFined aS the bOundLeSs THreE-dimensIOnAL ExteNt In WhicH evEnTs havE relATivE positiOn and direCtiON. TimE iS a ContinuUm in which evenTs Succeed one AnOthEr from PASt, througH present, to future. Space is OFten conCeiVed in ThreE linear diMenSions (lEngTH, width, Height), But moDeRn pHYSicisTS UsUalLy Consider it WITh tIme, as PaRt of A boundlEss four-dimensional COntInuum called spAce-Time. sPAcE-tiME iS Any MaTHemATIcal model that coMbines spacE aND tIme into a siNGle CoNtinuum (petkov, 2010). NOtice THat spacE and time aRe both defInEd in RELatIon to eventS. In physiCs, particuLArly rELaTivitY, an Event iS a PoiNt in sPace-tiME (a sPecifIc placE aNd time) And thE pHysical sItuation or occurrence assOciateD with It (FRench, 1968). The nOtiON of An event is An idEalization, In tHe sEnse tHat IT specIfieS A dEfiNIte tiMe anD Place, wherEAs Any ACTuAl event has a FINIte ExtenT, boTH in timE and Place (Sartori, 1996). Space ANd time have littLe meANIng And STrucTuRe for a single isOlaTeD EVent. HoweVeR, as soon as moRe than onE eVEnt ocCurs, spAce and Time acqUIRe MEaning And sTruCture; relaTioNsHIps arisE nAtURally bEtweEn
 mass are brought toward ( gravitatetowar d)one  a noth er.For most appli c atio ns, gravity is well ap proxi ma t ed b y  N ewton 's Lawo fU n ive rs al  Gr av i ta tion,  wh ich des cribes gra vit yas a force c a us ing any tw o b odies to beatt racted  t o e a ch ot her , wit h a fo r ce pro portional  t o  the p r oduct o f th eirmasses and invers e ly proportional t o thesq u ar e ofthe  distancebe tween them. G r av i t y , h o wever, is mos t accuratel y  de scribe dbyt he gen eralth e ory  of relativ ity(Einstein , 2001 ) , which describ es gra vit y a s th e  c ur vat ur e  of sp ace - tim e caused  b ythe l ocal d i s trib uti on o f mas s, momentum,and  ene r gy.  Gene ral r elat iv ity i s a ge ometr ic  theory of grav itat ion in wh ich  g rav it y isd escrib ed,  no t as aforce,b utas t h estructure (geodesi cs ) of  space-t ime. Q u an tu m  mechani cs  se ekst o  desc ribe gr avity (q uantum gr av ity) ac co rdingto  th e p rinci p lesof qua ntum fie ld th e ory, as a forc e . Consequentl y ,q u an t um m ech anics is in comp a tibl e wi t hgen e ral r elati vi t y. However, if quantum  g ravity  is a lso described , not as a f o rce, but  ast he structure of s pace- time, then quantummecha nics sea mlessly m e r ges with  ge ner alrel a t iv ity, providin g a un if ied the ory  of gra vit y.Suc h a  t heory wou ld unify  t he  f un dam ental forces o fnat ur e p roduc i ng a T heory  ofEv er y thi ng (a s i ng l e  all -e nc ompa ssi ng  cohe rent the oreticframework  of phys ic swhich f ully explains  a nd links t og eth er all p hysicalaspects of the universe - Weinber g,1993) . Th e notionofspace- tim e  is fu ndamen tal t othe u nders t a nd ing  o f gravity. S pac e may  b e de fined a s the boundless th r ee- dimensional e xte nt i n wh ich ev e nts  h a ver e lative position  and direc ti o n.  Time is a con ti nuum in  whichevent s  succee d one ano ther from  p ast, t hro ugh presen t, to fu ture. Spa c e iso ft en co nce ived i nthr ee li near d i men sions  (leng th , widt h, he ig ht), but  modern physicists usua lly co nside r i t with ti me, aspart of a  bou ndless fou r-d ime nsion alc ontin uumc al led space -tim e . Space-t i me  is a ny  mathematic a l mod el th atc ombine s sp ace and time into a single conti nuum ( Pet kov ,  201 0) . Notice thatspa ce a nd timear e both defi ned in r el a tionto eve nts. I n physi c s ,p articu larl y r elativity , a ne vent is  a  p o int in  spa ce -time(a spe c ific p lace and time) a nd th e physi c alsitua ti on or o c curr ence assoc iated withit (Fr ench , 196 8). The  n otionofan  event isa n idealiz ation , in th esens e t hat it  spe c i fiesa de fi nit e time an d pl a ce ,w her easany a ct ualevent has a finite  ex t ent, bo th  in t ime an d  p l a ce (Sartor i,1996) . Space andt imeh av e  litt le mea ning a nd stru c tur efor a s ing l e  isolated  event. H o wev er , as  soon as  m oreth anon e event occurs,  space a nd timea c quiremea n inga nd str uc ture; relati onshi ps arise n a t ura lly bet w een 
 mass_are brought_toward (gravitate toward) one_another. For_most_applications, gravity_is_well approximated by_Newton's Law of_Universal Gravitation, which describes_gravity as a_force_causing any two bodies to be attracted to each other, with a force proportional_to_the product_of_their_masses and inversely proportional to_the square of the distance_between them._Gravity, however, is most accurately described by the_general_theory of relativity_(Einstein, 2001), which describes gravity as the curvature of_space-time caused by the local distribution_of mass, momentum,_and_energy._General relativity is a_geometric theory of gravitation in which_gravity is described, not as a_force, but as the structure (geodesics) of_space-time. Quantum mechanics seeks to describe_gravity (quantum gravity) according to_the principles_of quantum field theory, as_a force. Consequently,_quantum mechanics_is incompatible with_general relativity. However, if quantum gravity_is also described,_not as a force, but as_the_structure of space-time,_then_quantum_mechanics seamlessly_merges with general_relativity,_providing a_unified_theory of gravity. Such a theory_would_unify the fundamental forces of nature producing_a Theory of Everything_(a_single all-encompassing coherent theoretic_framework of physics which fully_explains and links together all physical_aspects of_the universe-Weinberg,_1993). The notion of space-time is fundamental to the understanding of_gravity. Space may be defined as_the boundless three-dimensional extent_in which_events_have relative position_and_direction. Time_is a continuum in which events succeed_one another_from past, through present, to future._Space is often conceived_in_three linear dimensions (length, width, height),_but modern physicists usually consider it_with time, as part of_a_boundless_four-dimensional continuum called space-time. Space-time_is any mathematical model that combines_space and time_into a single continuum (Petkov, 2010). Notice_that_space and time are both defined_in_relation to events. In physics, particularly_relativity,_an_event is a point in_space-time (a specific place and time)_and the physical situation or occurrence associated with it_(French, 1968). The_notion of an event is_an_idealization,_in the sense that it specifies a definite time and_place, whereas_any actual event_has a finite extent, both in time and place (Sartori,_1996). Space and time have little meaning_and structure for a single isolated event. However, as soon as_more than one event occurs, space and time_acquire meaning and structure; relationships arise naturally_between