All measurements were made on the stellar magnitude
Yet we observe no semiannual differences in stellar magnitude
and no stellar parallax.
From Chapter X, second paragraph under Mercury, we have: 'The stellar magnitude
of Mercury at greatest elongation varies between -1.2 and +1.1, according to distance.'
It is exceedingly difficult to place the sun accurately on the stellar magnitude
scale, because it is 10 billion times brighter than the next brightest star, Sirius....
The moon's total brightness was equivalent to a stellar magnitude
The trouble is, there's no way an observer could actually find such faint targets using these charts, given the stellar magnitude
By carefully estimating the Moon's stellar magnitude
at mideclipse, skywatchers can measure the overall effect that volcanic eruptions in the last few years and other sources of high-altitude haze may have had on our atmosphere's transparency.
Making estimates of limiting stellar magnitude
cannot, however, evoke the appearance of a deep-sky object.
Estimating the Moon's overall stellar magnitude
isn't any use either, for the umbra will be swamped by glare from the part of the Moon that remains in the penumbra.
Still another useful gauge is the Moon's stellar magnitude
I printed the atlas so that all of the photographs represented the night sky to the same naked-eye visual stellar magnitude
and at the same scale.
One supporter posted a notice on the Internet, recreating the star chart in ASCII format with a different symbol for each stellar magnitude
. A weather forecaster mentioned our program on the nightly news.