Скачать или смотреть Unveiling the Universe's Ultimate Mystery: Faster-Than-Light Particles

Dive into the mind-bending world of theoretical physics as we explore the tantalizing possibility that tachyons, particles that defy causality and move faster than light, could be dominating the cosmos. Join us as we unravel the implications of this groundbreaking new paper and delve into the mysteries of dark matter and dark energy.

Interstellar space
During the history of the universe, what important event occurred about 0.001 seconds after the big bang?
Shown following are several times in the history of the universe. Rank these times from left to right based on the average temperature of the universe at each time, from coolest to hottest.
Shown following are the names of several eras that are used to describe the history of the universe. Rank the eras from left to right in the order in which they occurred, from first to last.
The data points on this graph represent the measured spectrum of the cosmic microwave background, while the solid curve represents a theoretically calculated thermal radiation spectrum for a temperature of 2.73 K. What is the significance of the near-perfect match between the data and the theoretical spectrum?
What was the significance of the end of the era of nucleosynthesis, when the universe was about 5 minutes old?
Which of the following does inflation help to explain?
Which of the following best explains why the night sky is dark?
During the history of the universe, what important event occurred about 380,000 years after the big bang?
The critical density of the universe is the __________.
Based on current evidence, decide whether each of the following statements applies to the concept of dark matter, dark energy, both, or neither. Drag each statement into the appropriate bin.
This figure shows an all-sky map of the cosmic microwave background recorded by the Planck telescope. How long did this light travel through space before it reached the telescope?
Why do scientists assume that the early universe was much hotter and denser than the universe of today?
Which of the following best summarizes what we mean by dark matter?
Consider a distant galaxy located directly behind a cluster of galaxies, as shown in this interactive figure. As seen from Earth, the gravitationally lensed images of the distant galaxy will appear more widely separated if the intervening cluster of galaxies has __________.
In general, what happens to the density and temperature of a gas as it expands?
Which of the following did not happen during the first few minutes after the big bang?
How does gravitational lensing tell us about the mass of a galaxy cluster?
Study the composite image of the Bullet Cluster, as well as the animations. What do the two large, red-colored regions in the composite image represent?
If Earth's mass were half its actual value but its radius stayed the same, the escape velocity of Earth would be __________.
Is space expanding within clusters of galaxies? Why or why not?
Which of the following statements best explains what we mean when we say that the electroweak and strong forces froze out at 10^-38 second after the big bang?
Where in space did the expansion of the universe begin?