your foot is 10 attoparsecs long & no single technique can measure distances at all ranges encountered in astronomy
A 19 trillion mile parsec is the distance from the Sun to an astronomical object that has a parallax angle of one arcsecond &…
your foot is 10 attoparsecs long & no single technique can measure distances at all ranges encountered in astronomy
A 19 trillion mile parsec is the distance from the Sun to an astronomical object that has a parallax angle of one arcsecond & 100 parsecs or 326 light years is a upper limit for Earth based telescope paralax mesurments without a second data source & this is 1000 parsecs or 3260 light years for space based scopes
Most of the stars visible to the unaided eye in the night sky are within 500 parsecs or 1630 light years
a Doppler shift of the spectral lines
Cosmic Microwave Background radiation spectrum
1838 the first successful parallax measurement ever, for the star 61 Cygni, by Friedrich Bessel
1896 5.6 K is Charles Édouard Guillaume estimate of the "radiation of the stars"
1941 2.3 K is Andrew McKellar detected coldest component of the interstellar medium
1965 3.0 K is the measured temperature by Arno Penzias and Robert Woodrow Wilson
this radiation is interpreted as the latent signature of the Big Bang
1989 the satellite Hipparcos parallax measured distances of 1,600 light-years
2009 Hubble WFC3 parallax measured distances of 3,066 parsecs 10,000 light years
The motion of the Sun & ours through space around the milky way =
it is impossible to distinguish the theoretical curve of a black body spectrum in nature from the observed data from the CBR
SUN spectrum peak centered at 500 nanometers or .5 micrometers
vs the CBR spectrum peak centered at 1 millimeter wavelenth
shows a shift of 2000 to one down in freequency so using
wavelenth observed - wavelenth source all devided by wavelenth at source
= redshift = z = .995 or .5983955903835825 of C or 179,395 km/s
or
111471 miles per second for the surface of last scattering
of radiation when universe was 379,000 years old
as a the black body . idealized physical body
that absorbs all incident electromagnetic radiation,
regardless of frequency or angle ..
