stellar parallax การใช้

• Thanks Andy, Stellar Parallax is the best answer I think.
• Stellar parallax remains the standard for calibrating other measurement methods.
• He then decided to experiment with applying photography to the determination of stellar parallax.
• Stellar parallax remains the standard for calibrating other measurement methods ( see Cosmic distance ladder ).
• Since stellar parallax is only detectable with telescopes, his accurate speculation was unprovable at the time.
• Bradley's discovery of the aberration of light was made while attempting to detect stellar parallax.
• This led to the first successful measurement of a stellar parallax, though not to the first publication thereof.
• His early work was focused on astrometrics, particularly in the examination of photographic plates to measure stellar parallax.
• He met with opposition from astronomers, who doubted heliocentrism because of the absence of an observed stellar parallax.
• Based upon stellar parallax measurements by the Hipparcos spacecraft, HD 147513 lies some 42 light years from the Sun.
• Stellar parallax measures are given in the tiny units of arcseconds, or even in thousandths of arcseconds ( milliarcseconds ).
• The first successful measurements of stellar parallax were made by Friedrich Bessel in 1838 for the star 61 Cygni using a heliometer.
• Stellar parallax is so difficult to detect that its existence was the subject of much debate in astronomy for thousands of years.
• Additionally, a Copernican system would suggest the ability to observe stellar parallax, which could not be observed until the 19th century.
• Based upon an annual stellar parallax shift of 6.56 milliarcseconds, it is located about 500 light years from the Sun.
• As a result of his work the knowledge of stellar parallaxes for the southern hemisphere became better known than that of the northern.
• From 1899 to 1903, he was an astronomer at Yerkes, where he pioneered the use of photographic methods to determine stellar parallaxes.
• The geocentric model, consistent with planetary parallax, was assumed to be an explanation for the unobservability of the parallel phenomenon, stellar parallax.
• Since the stellar parallax is usually too small to be measured for many distant stars, this is a common method of determining such distances.
• With a good enough telescope, it should also be possible to observe stellar parallax-and you could do this over six months or so.