Source / pinned edition
The Big Bang
Source of package openstax.particles · OpenStax University Physics, ch. 11 Particle Physics and Cosmology, module m58775
- work
- urn:openstax:clir:particles#M58775
- number
- OpenStax University Physics, ch. 11 Particle Physics and Cosmology, module m58775
- kind
- urn:openstax:clir:particles#treatise
m58775/index.cnxml at commit d0ed34a (main, 2026-06-11)
- edition
- urn:openstax:clir:particles#M58775_MAIN
- language
- en
- officiality
- official
- materialisation
- PINNED_OFFICIAL_BYTES
- life cycle
- adopted: 2026-06-11
Publications
| URI | Type | documentHash | Retrieved |
|---|---|---|---|
| https://raw.githubusercontent.com/openstax/osbooks-university-physics-bundle/d0ed34a5851119a42e3d972dfc0ff49e4663977c/modules/m58775/index.cnxml | application/xml; charset=utf-8 | sha256:70661cd197f368d59d6f352d4f76137d96e43c683b8a2116fe3b6e9948dd4c0b | 2026-09-06T00:00:00Z |
Fragments — 6
module/m58775#fs-id1172101987186 · defn
en · official · sha256:3ebb8f7900e87c58fe7a9b353dabc0f98df09f523f5df78bcba0b1235ad616d1
<definition id="fs-id1172101987186">
<term>Big Bang</term>
<meaning id="fs-id1172099488623">rapid expansion of space that marked the beginning of the universe</meaning>
</definition>module/m58775#fs-id1172099496924 · defn · referenced by: 1
en · official · sha256:1ca2d17cf680cabbb43edb83b269daf7b2cd5bf8cab4edbe68baf5b55fa5301e
<definition id="fs-id1172099496924">
<term>Hubble’s constant</term>
<meaning id="fs-id1172102133178">constant that relates speed and distance in Hubble’s law</meaning>
</definition>Referencing norms: hubble_constant_km_per_s_per_mpc
module/m58775#fs-id1172102020761 · defn · referenced by: 3
en · official · sha256:4608f1f1c2ea8c9c6e71854e1cb8b18e8901b4bcd8cb8f12df3140c63b039f04
<definition id="fs-id1172102020761">
<term>Hubble’s law</term>
<meaning id="fs-id1172102048411">relationship between the speed and distance of stars and galaxies</meaning>
</definition>Referencing norms: FarEnoughGalaxiesRecedeFasterThanLight, HubbleLaw, distance_in_megaparsecs
module/m58775#fs-id1172101888702 · section
en · official · sha256:900e9044d479e5358655e7525623c35ff473be21cd8f06d617b17cbcf6eca68c
<para id="fs-id1172101888702">where <m:math><m:mrow><m:msub><m:mi>H</m:mi><m:mn>0</m:mn></m:msub><m:mo>=</m:mo><m:mn>70</m:mn><m:mspace width="0.2em"/><m:mtext>km</m:mtext><m:mspace width="0.2em"/><m:mtext>/</m:mtext><m:mspace width="0.2em"/><m:mtext>s</m:mtext><m:mspace width="0.2em"/><m:mtext>/</m:mtext><m:mspace width="0.2em"/><m:mtext>Mpc</m:mtext></m:mrow></m:math> is known as <term id="term-00001">Hubble’s constant</term>. (<emphasis effect="italics">Note:</emphasis> 1 Mpc is one megaparsec or one million parsecs, where one parsec is 3.26 light-years.) This relationship, called <term id="term-00002">Hubble’s law</term>, states that distant stars and galaxies recede away from us at a speed of 70 km/s for every one megaparsec of distance from us. Hubble’s constant corresponds to the slope of the line in <link target-id="CNX_UPhysics_44_06_HubblesLaw"/>. Hubble’s constant is a bit of a misnomer, because it varies with time. The value given here is only its value <emphasis effect="italics">today</emphasis>.</para>module/m58775#fs-id1172099764629 · defn
en · official · sha256:7fe1bf9604c76f34c2ce2599f83cb2173a1dfdecb5c5f08e23693b8c8b61b111
<definition id="fs-id1172099764629">
<term>redshift</term>
<meaning id="fs-id1172102033569">lengthening of the wavelength of light (or reddening) due to cosmological expansion</meaning>
</definition>module/m58775#fs-id1172099541749 · section · referenced by: 1
en · official · sha256:4cca8404b20bf4aa0df5843e7ba119af3e886b4f09206a2dd5261966279d14b2
<equation id="fs-id1172099541749" class="unnumbered"><label/><m:math><m:mrow><m:mi>z</m:mi><m:mo>=</m:mo><m:msqrt><m:mrow><m:mfrac><m:mrow><m:mn>1</m:mn><m:mo>+</m:mo><m:mi>β</m:mi></m:mrow><m:mrow><m:mn>1</m:mn><m:mo>−</m:mo><m:mi>β</m:mi></m:mrow></m:mfrac></m:mrow></m:msqrt><m:mspace width="0.2em"/><m:mn>−1</m:mn><m:mo>,</m:mo></m:mrow></m:math></equation>Referencing norms: RedshiftFromRecessionSpeed
The hash beside the text is the sha256 of its exact bytes. It is the check that the text shown matches the one pinned in the package: a divergence fails the oracle’s static analysis.