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# Astrophysics/Size of Universe after inflaction

Question
Read in several publications that the Universe during a very short time (inflation), increased its size by a factor of 10 ^ 50. What does it mean to increase the size of 10 ^ 50 if you do not specify, from what? If I go from 1mm and the increase of 10 ^ 50 I will have a final measure, for example if I go by the Planck length I'll have another ...

Hello,

In  general, in terms of the operaton of cosmic inflation, we commence the initial size of the universe at 1 fm (Fermi = 10^ -15 m or about the size of a proton)

Then the inflating cosmos attains a scale of about eight times the Earth-Sun distance (8 astronomical units or 1.2 x 10^12 m) after 90 doubling times, with periods ranging from 10^ -43 secs to 10^ -36 secs.

Now, if you go from 1 fm  and increase the scale by 10 ^ 50 then:

(10^ -15 m) (10^50) =   10 ^35 m

Which is, of course, preposterous given the actual spatial diameter of the extant cosmos is 66 billion light years in diameter, or

(9.4 x 10^ 15 m/ LY) (6.6 x 10^10 LY) =  6.2 x 10^26 m

In other words the 10^50 factor would make the inflated cosmos some 24 orders of magnitude greater  than the diameter of the actual cosmos.

So, let's say something is fishy here! What I don't know since I have not seen the sources from which you extracted the information.

Astrophysics

Volunteer

#### Philip A. Stahl

##### Expertise

I specialize in stellar and solar astrophysics. Can answer questions pertaining to these areas, including: stellar structure and evolution, HR diagrams, binary systems, collapsars (black holes, neutron stars) stellar atmospheres and the spectroscopic analysis of stars – as well as the magnetohydrodynamics of sunspots and solar flares. Sorry – No homework problems done or research projects! I will provide hints on solutions. No nonsense questions accepted, i.e. pertaining to astrology, or 'UFOs' or overly speculative questions: 'traveling through or near black holes, worm holes, time travel etc. Absolutely NO questions based on the twaddle at this Canadian site: http://members.shaw.ca/warmbeach/FAQ.htm purporting to show a "new physics". Do not waste my time or yours by wasting bandwidith with reference to such bunkum.

##### Experience

Have constructed computerized stellar models; MHD research. Gave workshops in astrophysics (stellar spectroscopy, analysis) at Harry Bayley Observatory, Barbados. More than twenty years spent in solar physics research, including discovery of SID flares. Developed first ever consistent magnetic arcade model for solar flares incorporating energy dissipation and accumulation. Developed first ever loop-based solar flare model using double layers and incorporating cavity resonators. (Paper presented at Joint AGU/AAS Meeting in Baltimore, MD, May 1994)

Organizations
American Astronomical Society (Solar physics and Dynamical astronomy divisions), American Geophysical Union, American Mathematical Society, Intertel.

Publications
Papers appearing in Solar Physics, Journal of the Royal Astronomical Society of Canada, Journal of the Barbados Astronomical Society, Meudon Solar Flare Proceedings (Meudon, France). Books: 'Fundamentals of Solar Physics', 'Selected Analyses in Solar Flare Plasma Dynamics', 'Physics Notes for Advanced Level', 'Astronomy & Astrophysics: Notes, Problems and Solutions', 'Modern Physics: Notes, Problems and Solutions'

Education/Credentials
B.A. degree in Astronomy; M.Phil. degree in Physics - specializing in solar physics.

Awards and Honors
Postgraduate research award- Barbados government; Studentship Award in Solar Physics - American Astronomical Society. Barbados Astronomical Society award for service (1977-91) as Journal editor.

Past/Present Clients
Caribbean Examinations Council (as advisor, examiner), Barbados Astronomical Society (as Journal Editor 1977-91), Trinidad & Tobago Astronomical Society (as consultant on courses, methods of instruction, and guest speaker).