X

Aggregator

NASA's SPHEREx Space Telescope Begins Capturing Entire Sky

Slashdot
5 days 1 hour ago
NASA's SPHEREx space observatory has officially begun its two-year mission to map the entire sky in 102 infrared wavelengths, capturing about 3,600 images daily to create 3D maps of hundreds of millions of galaxies. Its goal is to unlock new insights into cosmic inflation, the origins of galaxies, and the building blocks of life in the Milky Way by using spectroscopy to analyze light and matter across the universe. From a press release: From its perch in Earth orbit, SPHEREx peers into the darkness, pointing away from the planet and the Sun. The observatory will complete more than 11,000 orbits over its 25 months of planned survey operations, circling Earth about 14.5 times a day. It orbits Earth from north to south, passing over the poles, and each day it takes images along one circular strip of the sky. As the days pass and the planet moves around the Sun, SPHEREx's field of view shifts as well so that after six months, the observatory will have looked out into space in every direction. When SPHEREx takes a picture of the sky, the light is sent to six detectors that each produces a unique image capturing different wavelengths of light. These groups of six images are called an exposure, and SPHEREx takes about 600 exposures per day. When it's done with one exposure, the whole observatory shifts position -- the mirrors and detectors don't move as they do on some other telescopes. Rather than using thrusters, SPHEREx relies on a system of reaction wheels, which spin inside the spacecraft to control its orientation. Hundreds of thousands of SPHEREx's images will be digitally woven together to create four all-sky maps in two years. By mapping the entire sky, the mission will provide new insights about what happened in the first fraction of a second after the big bang. In that brief instant, an event called cosmic inflation caused the universe to expand a trillion-trillionfold.

Read more of this story at Slashdot.

BeauHD

Error'd: Charge Me

The Daily WTF
5 days 1 hour ago

The lights are on here and the roof is intact and I'm grateful. Is anybody home? You decide.

Pharm fan Ian S. clucked "Perhaps they'll put those as dates on my headstone." If you're very lucky.

 

An anonymous reader blew the whistle on their child labor practices. "This institution exclusively uses drivers who aren't legally old enough to drive."

 

Greg A. grumbled "Glad that the important notice that there was no important notice was given such prominence in the official ACT web page." I have nothing more to add.

 

Regular reader Michael R. reported "I can confirm Hermes knows how to navigate the unknown."

 

Finally, faithful follower B.J.H. has been around here long enough to see this one over and over again. "For some reason people keep thinking zip codes are numbers just because they are composed of digits. When EPIC sent paper mail asking for money in December the envelope used a zip code of 1740 (and it was delivered). They solved leading zero issue by switching to base 36." Or it might just be base 26, no way to tell.

 

[Advertisement] ProGet’s got you covered with security and access controls on your NuGet feeds. Learn more.
Lyle Seaman

Spotify Moves To Bypass Apple Payments After Landmark Ruling

Slashdot
5 days 2 hours ago
Spotify has submitted an iOS app update that would allow US customers to use payment options beyond Apple's system, the company said Thursday. The move follows Wednesday's Epic Games v. Apple ruling, which prohibits Apple from taking a cut of non-Apple payment systems and from controlling how developers inform users about alternative payment methods. If approved, the update would enable US users to view subscription pricing details and promotions directly in-app, purchase subscriptions via external links, seamlessly switch between Premium plans, and access payment options beyond Apple's system. Spotify suggested the update could eventually facilitate additional purchasing opportunities, including audiobooks. "While other governments around the world have taken steps against Apple's harmful practices, this is, by far, the most consequential action to date," Spotify said, calling it "absurd" that these "basic services" weren't permitted despite being ordered by a judge four years ago. Patreon has similarly announced plans to submit an iOS app update allowing creators to accept non-Apple payments.

Read more of this story at Slashdot.

msmash