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Euclid, a space mission led by the European Space Agency.

The European Space Agency (ESA) is an intergovernmental organization dedicated to the exploration and study of space. ESA was established in 1975 and has 22 member states, with its headquarters located in Paris, France. ESA is responsible for the development and coordination of Europe’s space activities, including the design, construction, and launch of spacecraft and satellites for scientific research and Earth observation. Some of ESA’s flagship missions have included the Rosetta mission to study a comet, the Gaia mission to create a 3D map of the Milky Way, and the ExoMars mission to search for evidence of past or present life on Mars.

Following the path of electronic integrated circuits (EICs), silicon (Si) photonics holds promises to enable photonic integrated circuits (PICs) with high densities, advanced functionality and portability. Although various Si photonics foundries are rapidly developing PIC capabilities—enabling volume production of modulators, photodetectors and most recently lasers—Si PICs have yet to achieve the stringent requirements on laser noise and overall system stability imposed by many applications such as microwave oscillators, atomic physics and precision metrology9,10,11. Semiconductor lasers must strongly suppress amplified-spontaneous-emission noise to achieve narrow linewidth for these applications12. They will also require isolation from the rest of the optical system, otherwise the laser source will be sensitive to back-reflections from downstream optical components that are beyond the control of the PIC designer13. In many integrated photonic solutions, a bulk optical isolator must be inserted between the laser chip and the rest of the system, significantly increasing the complexity, as well as the cost of assembly and packaging14.

To enrich the capabilities of Si PICs and avoid multi-chip optical packaging, non-group-IV materials need to be heterogeneously integrated to enable crucial devices, including high-performance lasers, amplifiers and isolators15,16,17. It has now been widely acknowledged that group III–V materials are required to provide efficient optical gain for semiconductor lasers and amplifiers in Si photonics regardless of the integration architecture, but concerns still remain for a complementary metal–oxide–semiconductor (CMOS) fab to incorporate magnetic materials, which are currently used in industry-standard optical isolators18.

Fortunately, a synergistic path towards ultralow laser noise and low feedback sensitivity exists—using ultrahigh-quality-factor (Q) cavities for lasers that not only reduce the phase noise but also enhance the feedback tolerance to downstream links. These effects scale with the cavity Q and ultrahigh–Q cavities would thus endow integrated lasers with unprecedented coherence and stability19,20. The significance is twofold. First, the direct integration of ultralow-noise lasers on Si PICs without the need for optical isolators simplifies PIC fabrication and packaging. Furthermore, this approach does not introduce magnetic materials to a CMOS fab as isolators are not obligatory for such complete PICs.

Utilizing ultra-high-precision laser spectroscopy on a simple molecule, a team of physicists headed by Professor Stephan Schiller Ph.D. of Heinrich Heine University Düsseldorf (HHU) measured the wave-like vibration of atomic nuclei with an unprecedented level of precision.

In their paper published in the scientific journal Nature Physics.

As the name implies, Nature Physics is a peer-reviewed, scientific journal covering physics and is published by Nature Research. It was first published in October 2005 and its monthly coverage includes articles, letters, reviews, research highlights, news and views, commentaries, book reviews, and correspondence.

journey breaks several laws of physics in order to reach the known limit of the universe, using a spacecraft capable of travelling at any speed.
distance and speed are approximate, giving us an idea of how fast the spacecraft has to travel to move through the vast expanses of the universe.
the way, an AI will explain some important elements of the journey, to give us a more complete picture of what we are seeing.

WEBSITES
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(Youtube Library)
Hydra — Huma-Huma.
Eureka — Huma-Huma.
Atlantis — Audionautix.
Reflections — MK2
Angelic Forest — Doug Maxwell_Media Right Productions.
Landing On a Dark Planet — Doug Maxwell_Media Right Productions.

Moon — https://en.wikipedia.org/wiki/Moon.
Solar System — https://en.wikipedia.org/wiki/Solar_System.
Kuiper Belt — https://en.wikipedia.org/wiki/Kuiper_belt.
Oort Cloud — https://en.wikipedia.org/wiki/Oort_cloud.
Heliopause — https://en.wikipedia.org/wiki/Heliosphere#Heliopause.
Alpha Centauri — https://en.wikipedia.org/wiki/Alpha_Centauri.
Local Interstellar Cloud — https://en.wikipedia.org/wiki/Local_Interstellar_Cloud.
Local Bubble — https://en.wikipedia.org/wiki/Local_Bubble.
Orion Arm — https://en.wikipedia.org/wiki/Orion_Arm.
Milky Way — https://en.wikipedia.org/wiki/Milky_Way.
Andromeda Galaxy — https://en.wikipedia.org/wiki/Andromeda_Galaxy.
Local Group — https://en.wikipedia.org/wiki/Local_Group.
Laniakea Supercluster — https://en.wikipedia.org/wiki/Laniakea_Supercluster.
Pisces–Cetus Supercluster Complex — https://en.wikipedia.org/wiki/Pisces%E2%80%93Cetus_Supercluster_Complex.
Observable universe — https://en.wikipedia.org/wiki/Observable_universe.

Voice — voicemaker.in (Kendra)
Voice — voice.ai.
Numbers sound effect by Rho 2023 — https://youtu.be/hQf2VhYuaXc

New Patreon page! https://www.patreon.com/seanmcarroll.

Blog post: https://www.preposterousuniverse.com/podcast/2018/08/13/epis…n-nothing/

It’s fun to be in the exciting, chaotic, youthful days of the podcast, when anything goes and experimentation is the order of the day. So today’s show is something different: a solo effort, featuring just me talking without any guests to cramp my style. This won’t be the usual format, but I suspect it will happen from time to time. Feel free to chime in below on how often you think alternative formats should be part of the mix. The topic today is “Why Is There Something Rather than Nothing?”, or equivalently “Why Does the Universe Exist at All?” Heady stuff, but we’re not going to back away from the challenge.

What I have to say will roughly follow my recent paper on the subject, although in a more chatty and accessible style. It concerns ideas at the intersection of physics, philosophy, and theology, so tune in if you’re into that sort of thing.

Big news! After a number of people have asked, I have finally opened a Patreon account for people who would like to support Mindscape in some way. You can sign up to kick in a dollar or more per podcast episode, and in return you get 1) access to occasional Ask Me Anything episodes done exclusively for patrons, and 2) my undying gratitude. If the Patreon route is successful enough, I’ll forego having ads on the podcast — we’ll see how it goes.

Scientists have claimed to make a breakthrough that would be “one of the holy grails of modern physics” – but experts have urged caution about the results.

In recent days, many commentators have become excited by two papers that claim to document the production of a new superconductor that works at room temperature and ambient pressure. Scientists in Korea said they had synthesised a new material called LK-99 that would represent one of the biggest physics breakthroughs of recent decades.

Superconductors are a special kind of material where electrical resistance vanishes, and which throw out magnetic fields. They are widely useful, including in the production of powerful magnets and in reducing the amount of energy lost as it moves through circuits.

With breakthroughs in astronomical observation, scientists now have confirmed the existence of supermassive black holes at the centers of galaxies. The recent release of black hole images has further charged people’s curiosity about black holes while providing additional evidence to support Einstein’s general theory of relativity.

These supermassive range in mass from millions to billions of solar masses. Astonishingly, some of these black holes have formed less than a billion years after the Big Bang. Understanding how these black holes formed and grew to such enormous mass in such a short period of time has always been an important topic in modern astrophysics.

A research team composed of Chi-Hong Lin and Ke-Jung Chen from the Institute of Astronomy and Astrophysics, Academia Sinica (ASIAA) and Chorng-Yuan Hwang from the Institute of Astronomy at National Central University has made significant new advances in the formation theory of supermassive black holes. The research results have been published in The Astrophysical Journal.