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  2. Higgs boson - Wikipedia

    en.wikipedia.org/wiki/Higgs_boson

    As observed, the present vacuum energy density is extremely close to zero, but the energy densities predicted from the Higgs field, supersymmetry, and other current theories are typically many orders of magnitude larger. It is unclear how these should be reconciled. This cosmological constant problem remains a major unanswered problem in physics.

  3. Mechanism of sonoluminescence - Wikipedia

    en.wikipedia.org/wiki/Mechanism_of_sonoluminescence

    The thermal energy that is released from the bubble collapse is so great that it can cause weak light emission. [1] The mechanism of the light emission remains uncertain, but some of the current theories, which are categorized under either thermal or electrical processes, are Bremsstrahlung radiation, argon rectification hypothesis, [ 2 ] and ...

  4. Interstellar travel - Wikipedia

    en.wikipedia.org/wiki/Interstellar_travel

    For example, a spaceship could travel to a star 32 light-years away, initially accelerating at a constant 1.03g (i.e. 10.1 m/s 2) for 1.32 years (ship time), then stopping its engines and coasting for the next 17.3 years (ship time) at a constant speed, then decelerating again for 1.32 ship-years, and coming to a stop at the destination. After ...

  5. Is a NASA team about to crack interstellar travel? - AOL

    www.aol.com/article/2015/05/05/is-a-nasa-team...

    NASA has a well-deserved reputation for making the unthinkable a reality. So what are we to make of it when a handful of NASA scientists quietly leak the news that they've defied the laws of physics?

  6. Parker Solar Probe - Wikipedia

    en.wikipedia.org/wiki/Parker_Solar_Probe

    Peeking over the heat shield to measure how electrons and ions are moving, the cup is exposed to the full light, heat and energy of the Sun. The cup is composed of a series of highly transparent grids — one of which uses variable high voltages to sort the particles — above several collector plates, which measure the particles' properties.

  7. Faster-than-light - Wikipedia

    en.wikipedia.org/wiki/Faster-than-light

    Faster-than-light (superluminal or supercausal) travel and communication are the conjectural propagation of matter or information faster than the speed of light (c). The special theory of relativity implies that only particles with zero rest mass (i.e., photons) may travel at the speed of light, and that nothing may travel faster.

  8. Ukraine says it has a laser that can shoot down aircraft a ...

    www.aol.com/news/ukraine-says-laser-shoot-down...

    Senft added that such weapons had two key limitations, related to how fast their target is traveling and how the lasers lose energy the farther they travel. Faster-moving or heat-resistant targets ...

  9. Photosynthetic efficiency - Wikipedia

    en.wikipedia.org/wiki/Photosynthetic_efficiency

    The value of the photosynthetic efficiency is dependent on how light energy is defined – it depends on whether we count only the light that is absorbed, and on what kind of light is used (see Photosynthetically active radiation). It takes eight (or perhaps ten or more [1]) photons to use one molecule of CO 2.