Unlike solar panels on Earth, a solar power plant in space would provide a constant power supply 24/7.
ReachBot is inspired by the movement of the Harvestman spider, also known as a daddy-long-legs. The current model boasts a small body and long, extendable legs equipped with grippers. Moreover, the booms will allow the robot to move ahead.
These appendages allow ReachBot to navigate through the narrow passages of Martian caves to hunt for signs of life and other key resources, like water. The multiple extendable boom limbs have a three-finger gripper that clutches onto the rocks and uses them as anchor points.
HELIOS is an advanced solar sail concept being evaluated by NASA’s Space Technology Mission Directorate (STMD).
NASA’s STMD rapidly develops, demonstrates, and infuses revolutionary, high-payoff technologies through transparent, collaborative partnerships, expanding the boundaries of the aerospace enterprise.
Quantum chaos focuses on the quantum manifestations of classical chaos. A characteristic of classical chaos is the exponential sensitivity of the dynamics with respect to infinitesimal changes in the initial conditions. Thus, to classify classical dynamics it is sufficient to follow phase space trajectories starting infinitesimally close to each other and to determine the evolution of their distances with respect to each other with time. Because of the uncertainty relation, this is no longer possible in the corresponding quantum system. One important aspect of quantum chaos is the understanding of features of the classical dynamics in terms of the fluctuation properties in the energy spectra of closed quantum systems or of the fluctuations exhibited by the scattering matrix elements describing open ones. The fluctuation properties are predicted to be universal, that is, to be the same for systems belonging to the same universality class and exhibiting the same chaotic behavior in the corresponding classical dynamics and to be describable by random matrix theory. Furthermore, random-matrix models that had been developed for the scattering matrix associated with compound-nuclear reactions have been shown to be applicable to quantum-chaotic scattering processes. A second important aspect within the field of quantum chaos concerns the semiclassical approach. In this context, one of the most important achievements was the periodic orbit theory pioneered by Gutzwiller, which led to understanding the impact of the classical dynamics on the properties of the quantum system in terms of purely classical quantities. The focus of research within the field of quantum chaos has been extended to relativistic quantum systems and to many-body quantum systems with focus on random matrix theory and the semiclassical approach. In distinction to single-particle systems, many-body systems like atomic nuclei do not have a classical analogue. In recent years different measures of chaos and models have been developed. Here, a prominent model is the Sachdev-Ye-Kitaev model which serves as a paradigm for the study of quantum chaos in strongly interacting many-body systems. The school is aimed at PhD students, post-docs and outstanding master students and the first part will provide a survey of single-and many-body quantum chaos and applications based on random-matrix theory and the semiclassical approach. The second part of the school will focus on current aspects of research in the context of many-body quantum chaos. There is no registration fee and limited funds are available for travel and local expenses. Organizers: Hilda Cerdeira (IFT-UNESP, Brazil) Barbara Dietz-Pilatus (Institute for Basic Science (IBS), Republic of Korea)
Check out the math & physics courses that I mentioned (many of which are free!) and support this channel by going to https://brilliant.org/Sabine/ where you can create your Brilliant account. The first 200 will get 20% off the annual premium subscription. You have probably heard people saying that the problem with quantum mechanics is that it’s non-local or that it’s impossible to understand or that it defies common sense. But the problem is much simpler, it’s that quantum mechanics is a linear theory and therefore doesn’t correctly reproduce chaos. Physicists have known this for a long time but it’s rarely discussed. In this video I explain what the problem is, what physicists have done to try and solve it, and why that solution doesn’t work. Subscribe to my weekly science newsletter: https://sabinehossenfelder.com/ You find the estimate for Saturn’s moon Hyperion in Zurek’s review https://arxiv.org/abs/quant-ph/0105127 A much easier to digest and more readable review by Michael Berry is here: https://michaelberryphysics.files.wor… you can find a brief summary on Sean Carroll’s blog https://www.preposterousuniverse.com/… 0:00 Intro 0:27 The trouble with Hyperion 4:04 The alleged solution 6:02 The trouble with the solution 7:46 What a real solution requires 10:31 Sponsor message.
New research unveils a surprising twist in the composition of our Solar System’s distant giants.
NASA keeps adding nations to its international commitment for responsible moon exploration.
Does Saturn’s largest moon, Titan, have the necessary ingredients for life as we know it, or even as we don’t know it? This is what NASA’s Dragonfly rotorcraft mission hopes to address as the space agency recently announced that the Dragonfly team can proceed to the final phases of design, construction, and testing, with a scheduled launched date of 2028. This comes after Dragonfly was selected by NASA in June 2019 and could help scientists better understand the origins of life beyond Earth.
“The Dragonfly mission is an incredible opportunity to explore an ocean world in a way that we have never done before,” said Dr. Elizabeth “Zibi” Turtle of the Johns Hopkins University Applied Physics Laboratory (APL) and the Dragonfly Principal Investigator. “The team is dedicated and enthusiastic about accomplishing this unprecedented investigation of the complex carbon chemistry that exists on the surface of Titan and the innovative technology bringing this first-of-its-kind space mission to life.”
Titan has intrigued scientists for several decades, as it’s the only moon in the solar system with a dense atmosphere and the only planetary body other than Earth with standing bodies of liquid on its surface. However, these bodies of liquid are comprised of methane and ethane as Titan’s surface temperature is a blistering-290 degrees Fahrenheit, which is cold enough to keep methane and ethane in a liquid form, whereas they are gases on Earth.
If the effect is confirmed to be happening over WASP-76b, it could reveal a great deal about this strange and extreme exoplanet — a world unlike anything seen in our stellar domain.
Related: Ultra-hot exoplanet has an atmosphere of vaporized rock
“There’s a reason no glory has been seen before outside our Solar System – it requires very peculiar conditions,” Olivier Demangeon, team leader and an astronomer at the Institute of Astrophysics and Space Sciences in Portugal, said in a statement. “First, you need atmospheric particles that are close-to-perfectly spherical, completely uniform and stable enough to be observed over a long time. The planet’s nearby star needs to shine directly at it, with the observer — here CHEOPS — at just the right orientation.”
