1Old Guide (Archive)
Comet U1 NEOWISE: A Possible Binocular Comet?
Well, it looks like we'll close out 2016 without a great 'Comet of the Century.' One of the final discoveries…
What is Absolute Pressure?
When it comes to measurements, the everyday kind that deal with things like air pressure, tire pressure, blood pressure, etc.,…
What Is A Singularity?
The concept of a space-time singularity - where time and space itself become infinite and undifferentiated - is one of…
What is Gravitational Force?
Newton's Law of Universal Gravitation is used to explain gravitational force. This law states that every massive particle in the…
What is Schrodinger’s Cat?
Schrodinger's cat is named after Erwin Schrödinger, a physicist from Austria who made substantial contributions to the development of quantum…
What is the Boltzmann Constant?
There are actually two Boltzmann constants, the Boltzmann constant and the Stefan-Boltzmann constant; both play key roles in astrophysics ……
What is Beta Radiation?
Beta radiation is radiation due to beta particles, which are electrons (or, sometimes, positrons); mostly, when you come across the…
What is Absolute Temperature?
If you measure temperature relative to absolute zero, the temperature is an absolute temperature; absolute zero is 0. The most…
What is Alpha Radiation?
Alpha radiation is another name for the alpha particles emitted in the type of radioactive decay called alpha decay. Alpha…
What is Cherenkov Radiation?
Cherenkov radiation is named after the Russian physicist who first worked it out in detail, in 1934, Pavel Alekseyevich Cherenkov…