If they know the star's brightness and the distance to the star, they can calculate the star's luminosity: [luminosity = brightness x 12.57 x (distance)2]. Luminosity is also related to a star's size. The larger a star is, the more energy it puts out and the more luminous it is....
To determine the luminosities of the globular clusters, Shapely measured the periods of brightness of the RR Lyrae stars in the clusters. Once he knew the luminosities, he could calculate their distances from Earth. How Many Stars Are in the Milky Way? It's complicated, but you can use Newt...
Because the stellar magnitude scale is based on logs, each integer step corresponds to a 2.5-fold change in brightness. Thus a 2.3-magnitude star is 2.5 times as bright as a 3.3-magnitude star and about (2.5 × 2.5 = 6.25) times as bright as a 4.3-magnitude star. How to Calculate Ant...
In order to thrive and grow, your weed needs… Light (brightness has a huge effect on yields) Air (fresh air with a slight breeze is best) a Grow Medium (place to grow, soil isn’t your only choice) the right Temperature (room temperature or a little warmer is perfect during the day...
The Luminance slider changes the brightness of the color, making it lighter or darker. With the HSL sliders, you have the power to subtly improve your colors or completely transform them. To learn more about hsl in lightroom, check out this in-depth article. Vibrance and Saturation Vibrance ...
This property comes in handy in physical situations in which this kind of relationship holds. For example, star brightness is classified on the basis of apparent magnitude, with the scale originally set so that 0 was close to the brightest star in the sky and 5 was visible only to eagle-ey...
You will have to be careful when moving the Hue slider. For instance, if I want to edit the yellow hue of the buildings, the sunset will also be affected. This is apparent in all HSL adjustments, so you may want to make your own mask. ...
You can use the changes in the light intensities to calculate the rate of the asteroid's rotation. Comets and Meteors Comet Kohoutek Photo courtesy of NASA A comet or a meteor streaking across the sky is an exciting sight for anyone, and a telescope can make these objects even more ...
I've been having difficulty determining how these are actually generated, and how I might generate kernel parameters beyond the 6 that are listed here (as in, how to calculate for 7, 8, 9, etc.). The explanations I've found are not close enough to my comprehension of the math involved...
When soft proofing under their profile, there's some significant changes to color/brightness/contrast/etc. that I want to change to bring the proof view version of the image back into line with my Working CMYK view version. Once that's done, I can swit...