Physics and Astronomy

This area deals with the fundamental laws and building blocks of nature and how they interact, the properties and the behavior of matter, and research into space and time and their structures.

innovations-report provides in-depth reports and articles on subjects such as astrophysics, laser technologies, nuclear, quantum, particle and solid-state physics, nanotechnologies, planetary research and findings (Mars, Venus) and developments related to the Hubble Telescope.

Scientists discover air is heavier than we thought

Scientists have discovered that the air in the atmosphere around us is heavier (more dense) than they had previously thought. Knowing this will enable scientists to measure the mass of objects more accurately than ever before.

Writing in the Institute of Physics journal Metrologia, a team from the Korea Research Institute of Standards and Science (KRISS) and the International Bureau of Weights and Measures (BIPM) in France, report a new determination of the content of argon in a

Ultrafast laser speeds up quest for atomic control

It’s the scientific equivalent of having your cake and eating it too. A team of researchers from JILA, a joint institute of the Commerce Department’s National Institute of Standards and Technology and the University of Colorado at Boulder, has developed an efficient, low-cost way to measure the energy levels of atoms in a gas with extremely high accuracy, and simultaneously detect and control transitions between the levels as fast as they occur. The technique is expected to have practical applica

Unusual material that contracts when heated is giving up its secrets to physicists

Most solids expand when heated, a familiar phenomenon with many practical implications. Among the rare exceptions to this rule, the compound zirconium tungstate stands out by virtue of the enormous temperature range over which it exhibits so-called “negative thermal expansion,” contracting as it heats up and expanding as it cools, and because it does so uniformly in all directions.

While engineers are already pursuing practical applications in areas ranging from electronics to

Resolving the controversy about the Pleiades distance?

The Pleiades are one of the most famous and brightest stellar clusters in our Galaxy. One might imagine that the distance to such an important object would be well-known and no longer poses a problem for astrophysicists. For several years, however, determining the distance to the Pleiades has been a crucial and complicated problem.

For several decades, the distance to the Pleiades was determined by methods relying on our knowledge of stellar physics that was assumed to be rather

Stellar Clusters Forming in the Blue Dwarf Galaxy NGC 5253

Star formation is one of the most basic phenomena in the Universe. Inside stars, primordial material from the Big Bang is processed into heavier elements that we observe today. In the extended atmospheres of certain types of stars, these elements combine into more complex systems like molecules and dust grains, the building blocks for new planets, stars and galaxies and, ultimately, for life. Violent star-forming processes let otherwise dull galaxies shine in the darkness of deep space and make

Los Alamos software key to new Swift satellite mission

“Swift,” a new NASA satellite, will head for the heavens Nov. 17, designed to detect gamma-ray bursts and whip around to catch them in the act. And the trigger software that makes the flying observatory smart enough to do this comes from the Space Science team at the Los Alamos National Laboratory.

Gamma-ray bursts, first discovered by Los Alamos in the course of nuclear nonproliferation data analysis, occur randomly throughout the universe. They are the most powerful explos

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