Posts by Milkeyway in Space and Time
why gravity assist being used ?
A spacecraft traveling from
why gravity assist being used ? A spacecraft traveling from Earth to an inner planet will accelerate because it is falling toward the Sun, and a spa...
why gravity assist being used ? A spacecraft traveling from Earth to an inner planet will accelerate because it is falling toward the Sun, and a spa...
Black holes and entropy
Black holes are objects so dense that
Black holes and entropy Black holes are objects so dense that the escape velocity from their surface exceeds the speed of light, c. Because of that, ...
Black holes and entropy Black holes are objects so dense that the escape velocity from their surface exceeds the speed of light, c. Because of that, ...
Strings and Extra Dimensions
Most physical theories have a
Strings and Extra Dimensions Most physical theories have a unique basic set of fields and interactions, but the equations may have many different sol...
Strings and Extra Dimensions Most physical theories have a unique basic set of fields and interactions, but the equations may have many different sol...
Quantum gravity is not a mystery that is, as yet, open to
Quantum gravity is not a mystery that is, as yet, open to experiment. With a few exceptions such as inflationary cosmology and, quite possibly, the co...
Quantum gravity is not a mystery that is, as yet, open to experiment. With a few exceptions such as inflationary cosmology and, quite possibly, the co...
Two consequences of Special Relativityare a stationary observer
Two consequences of Special Relativityare a stationary observer will find (1) the length of a fast-moving object is less than if the object was at r...
Two consequences of Special Relativityare a stationary observer will find (1) the length of a fast-moving object is less than if the object was at r...
The Mystery of the Missing Matter
According to the best
The Mystery of the Missing Matter According to the best cosmological models, the total mass of the Universe (inferred from its gravitational force) ...
The Mystery of the Missing Matter According to the best cosmological models, the total mass of the Universe (inferred from its gravitational force) ...
Bullets of the Cosmos
The origin of cosmic rays is a
Bullets of the Cosmos The origin of cosmic rays is a 90-year-old mystery. Most of these high energy nuclei are thought to be hurled at us by supern...
Bullets of the Cosmos The origin of cosmic rays is a 90-year-old mystery. Most of these high energy nuclei are thought to be hurled at us by supern...
The Beginning of Time
The Universe is expanding, and abundant
The Beginning of Time The Universe is expanding, and abundant evidence now shows that it began in a hot, dense state—the Big Bang. The general th...
The Beginning of Time The Universe is expanding, and abundant evidence now shows that it began in a hot, dense state—the Big Bang. The general th...
8) Spiral arms are an illusion.
Well, they’re not an illusion
8) Spiral arms are an illusion. Well, they’re not an illusion per se, but the number of stars in the spiral arms of our galaxy isn’t really very ...
8) Spiral arms are an illusion. Well, they’re not an illusion per se, but the number of stars in the spiral arms of our galaxy isn’t really very ...