Using Θ and Earth's orbit radius (R), they calculate a star's distance (D) as: D = RCotΘ. This is effective for stars within 50 parsecs. For farther stars, other methods involving luminosity are used. Globular Clusters and Spiral Nebulae Around the time that Kapteyn published his ...
This75-inch Amazon Fire TVoffers a 4K UHD display and enhanced color and clarity thanks to Dolby Vision. The TV also supports voice control with Amazon Alexa. It's high-quality picture quality and large size make this TV a solid choice for football fans -- plus it's hard to find such ...
The awesome part about the discovery of 150418 was that since the host object was found, by comparing the bursts' peak luminosity to the expectation, scientists can determine the matter density between us and the galaxy, which can help resolve models of the Universe. All of this sounds great,...
Researchers define a light curve as a measurement of the brightness of a star over a longer period of time. The brightness of a star fluctuates constantly, for example because its luminosity is subject to natural fluctuations. Exoplanets can also leave traces in the light curve. If an exoplane...