Which is the brightest star in the night sky?

When one asks, “Which is the brightest star in the night sky?” they tend to refer to the star that appears brightest to the ...
SpaceNews

Satellite constellations fall short of meeting brightness goals

Streaks caused by satellites are visible in a image taken with the Vera C. Rubin Observatory in the foreground. Credit: RubinObs/NSF/DOE/NOIRLab/SLAC/AURA/W. O ...
Astronomy

The star that changed the cosmos: M31-V1

Hubble proved Andromeda is a separate galaxy by identifying a Cepheid variable star within it. Cepheid variables have a period-luminosity relationship: longer period means greater brightness. Knowing ...
Astronomy

How do Cepheid variables indicate distance?

Cepheid variables are a type of star that undergo regular pulsations. The length of a Cepheid’s pulsations is always related to its intrinsic, or absolute, brightness in a simple way: The longer its ...
Gizmodo

Satellite Companies Like SpaceX Are Ignoring Astronomers’ Calls to Save the Night Sky

There are more than 12,000 active satellites circling Earth at the moment, a growing figure that has nearly doubled in less than three years. This recent boom in the satellite industry has been a ...