Joined in 2023 
82 
63 About this deal
Specifically, Maldacena showed that a five-dimensional theory of a type of imaginary spacetime called anti–de Sitter space (AdS) that included gravity could describe the same system as a lower-dimensional quantum field theory of particles and fields in the absence of gravity, referred to as a conformal field theory (CFT). In other words, he found two different theories that could describe the same physical system, showing that the theories were, in a sense, equivalent—even though they included different numbers of dimensions, and one factored in gravity where the other didn't. Maldacena then surmised that this AdS/CFT duality would hold for other pairs of theories in which one had a single extra dimension, possibly even those describing 4-D spacetime akin to ours. The lights shine through a refractor dome. It features unique angles that bounce light in all directions, creating that signature galactic feel. It even rotates, bringing some motion into the mix. Take control of the lights with the included remote. You can cycle through modes, set the timer, and more. Create A Night Sky Projection Kit:If you've got time with the kids to fill, this could be a fun introduction to stargazing. Don't expect to be dazzled by a plug-and-play awe-inspiring experience, but you can enjoy the process of setting it up with your kids.★★★ During our Aurora Borealis Northern Lights Star Projector review, we were impressed with the musical rhythm mode. It does a good job or adjusting the lighting display to match the 'feel' of the music, and you can adjust the sensitivity of the microphone to alter the power of the light display, making it perfect for using at parties.
Brainstorm Toys Deep Space Home Planetarium Star ProjectorA neat little STEM toy with multiple functions. Kids between 6 and 10 will love to learn more about space with this hands-on device.★★★½ Once spacetime emerges in a theory, physicists can use it to study aspects of our universe. For example, our cosmos is thought to have expanded exponentially in the first fractions of a second of its existence during inflation. In the standard model of cosmology, theorists start with a spacetime in which particles and fields interact weakly and let inflation proceed for about 50 to 60 “ e-folds,” where each e-fold represents more than a doubling of the volume of spacetime (as it increases by a factor of Euler's number e, or approximately 2.718). Such inflation can replicate the properties of the observed universe, such as its flatness and isotropy (the fact that it looks the same in all directions).As influential as AdS/CFT has proved, the duality still uses a spacetime that does not describe our own reality. Maldacena hopes researchers will find a similar correspondence between de Sitter space—the spacetime we occupy—and a CFT. “I would very much like to have [a] similar statement for de Sitter,” he says. “People keep thinking about it, but no clear contender has emerged so far.” There isn't a 'top X star projector list' you'll come across without finding the Sega Toys Homestar Flux taking a podium position. Unlike many 'star projectors,' this model's main focus (no pun intended) is to project a realistic-looking, high-quality image of extraterrestrial subjects onto your wall or ceiling, often using real photos from various observation stations around the world. It ships with two disks as standard, but with over 30 compatible disks available as additional add-ons, there's a greater level of exploration to be had than with other star projectors and home planetariums.
Right off the bat, this star light projector is really astonishing. Starting from how it looks and ending with what it actually does, everything in it is as close to perfection as possible.
Customer reviews
Look at a standard hologram, printed on a 2D surface, and you’ll see a 3D projection of the image. Decrease the size of the individual dots that make up the image, and the hologram gets sharper. In the 1990s, physicists realized that something like this could be happening with our universe. Why it made the cut: NEWSEE’s Northern Lights Star Projector lets you take the magic of the stars with you everywhere. Speaking of the former, the unit doesn't look like a typical projector. It sports a very modern round-shaped design reminiscent of that you'd find in Apple's range of products so it will seamlessly blend into any interior.
One of the major benefits of this model is the ability to help calm your mind and drift away to a deep sleep. The soothing and relaxing galaxy light calms the senses, and helps to properly wind down from a hard day at work or school. There is one rotation speed which is slow and soothing — there's a little bit of noise from the motor but nothing that would be distracting, and better than many models we've tested.That being said, the white housing gets easily soiled, so you'll likely have to wipe it on a frequent basis, a bit of a shame but nothing to complain too much about either. As discussed in our Bresser Junior Astro-Planetarium Deluxe review, this star projector draws many parallels to the Bresser-made National Geographic Astro Planetarium but doesn't include an integrated FM radio or the ability to attach an audio device. The Bresser Junior can only be powered by 3 x AA batteries, so buyers will likely need to grab some spares if they plan on using it long-term. Then there are scientific home planetariums that generally project 'real imagery,' so you can study and enjoy projections of real galaxies and nebulas from the comfort of your own home without investing in expensive astronomy equipment. These are much more likened to the more traditional planetariums that teach astronomy and related sciences. It doesn't matter what the science says, the stars are magic. Their visual appeal is almost magnetic, there isn't a kid nor an adult (provided he hasn't lost his sense of joy and wonder) that isn't fascinated by them, regardless of their knowledge on the subject. Of course, the stars are always there but they aren't always visible to the naked eye. When they aren't, a starlight projector will have to do. In case the name itself isn't enough of a giveaway, a projector like that is a device that, using a combination of lasers, regular lights, and different reflections, lights up the walls, the ceiling, and the floor with the most remarkable imagery.
Great Deal 
New Comment