NASA Astronomy Picture of the Day

Mar 6, 2024

M102: Edge-on Disk Galaxy

What kind of celestial object is this? A relatively normal galaxy – but seen from its edge. Many disk galaxies are actually just as thin as NGC 5866, the Spindle galaxy, pictured here, but are not seen edge-on from our vantage point. A perhaps more familiar galaxy seen edge-on is our own Milky Way galaxy. Also cataloged as M102, the Spindle galaxy has numerous and complex dust lanes appearing dark and red, while many of the bright stars in the disk give it a more blue underlying hue. The blue disk of young stars can be seen in this Hubble image extending past the dust in the extremely thin galactic plane. There is evidence that the Spindle galaxy has cannibalized smaller galaxies over the past billion years or so, including multiple streams of faint stars, dark dust that extends away from the main galactic plane, and a surrounding group of galaxies (not shown). In general, many disk galaxies become thin because the gas that forms them collides with itself as it rotates about the gravitational center. The Spindle galaxy lies about 50 million light years distant toward the constellation of the Dragon (Draco).

https://apod.nasa.gov/apod/astropix.html?

The Universe is Calling: Apply to Be a NASA Astronaut (Official NASA Video feat. Morgan Freeman)

We’re recruiting for our next class of NASA astronauts. Selected candidates could fly on Artemis missions to the Moon and, eventually, Mars. Will you be one of them?

Applications are open from March 5 through April 2, 2024. Read the requirements and start your application by visiting https://go.nasa.gov/astro2024.

Don't think you have what it takes? There's no such thing as a typical astronaut. We’re seeking out team players, passionate people, candidates who thrive under pressure and excel in what they do.

The universe is calling. Explore with us.

https://www.youtube.com/watch?v=lqQylsc5krg

What Are Hubble and Webb Observing Right Now? NASA Tool Has the Answer

MAR 06, 2024

It’s not hard to find out what NASA’s Hubble and James Webb space telescopes have observed in the past. Barely a week goes by without news of a cosmic discovery made possible using images, spectra, and other data captured by NASA’s prolific astronomical observatories.

But what are Hubble and Webb looking at right this minute? A shadowy pillar harboring nascent stars? A pair of colliding galaxies? The atmosphere of a distant planet? Galactic light, stretched and distorted on a 13-billion-year journey across space?

NASA’s Space Telescope Live, a web application originally developed in 2016 to deliver real-time updates on Hubble targets, now affords easy access to up-to-date information on current, past, and upcoming observations from both Hubble and Webb.

Designed and developed for NASA by the Space Telescope Science Institute in Baltimore, this exploratory tool offers the public a straightforward and engaging way to learn more about how astronomical investigations are carried out.

With its redesigned user interface and expanded functionality, users can find out not only what planet, star, nebula, galaxy, or region of deep space each telescope is observing at the moment, but also where exactly these targets are in the sky; what scientific instruments are being used to capture the images, spectra, and other data; precisely when and how long the observations are scheduled to occur; the status of the observation; who is leading the research; and most importantly, what the scientists are trying to find out.

Information for observations from approved science programs is available via the Mikulski Archive for Space Telescopes. NASA’s Space Telescope Live offers easy access to this information – not only the current day’s targets, but the entire catalog of past observations as well – with Webb records dating back to its first commissioning targets in January 2022, and Hubble records all the way back to the beginning of its operations in May 1990.

The zoomable sky map centered on the target’s location was developed using the Aladin Sky Atlas, with imagery from ground-based telescopes to provide context for the observation. (Because the Hubble and Webb data must go through preliminary processing, and in many cases preliminary analysis, before being released to the public and astronomy community, real-time imagery is not available in this tool for either telescope.)

Details such as target name and coordinates, scheduled start and end times, and the research topic, are pulled directly from the observation scheduling and proposal planning databases. Links within the tool direct users to the original research proposal, which serves as a gateway to more technical information.

While this latest version of NASA’s Space Telescope Live constitutes a significant transformation from the previous release, the team is already gathering feedback from users and planning additional enhancements to provide opportunities for deeper exploration and understanding.

NASA’s Space Telescope Live is designed to work on desktop and mobile devices, and is accessible via NASA’s official Hubble and Webb websites. Additional details about the content, including public-friendly explanations of the information displayed in the tool, can be found in the User Guide.

https://science.nasa.gov/missions/hubble/what-are-hubble-and-webb-observing-right-now-nasa-tool-has-the-answer/

https://spacetelescopelive.org/

Tech Today: Semiconductor Research Leads to Revolution in Dental Care

MAR 05, 2024

Toothpaste based on the mineral hydroxyapatite, popular across Asia and much of Europe today, is finding its first foothold in the U.S. But the idea behind this alternative to fluoride-based toothpaste was conceived here in a short-lived NASA field center more than 50 years ago.

While working at NASA’s Electronics Research Center – active in Cambridge, Massachusetts, from 1964 to 1970 – Senior scientist Bernard Rubin discovered semiconductor crystals for electronics grew best in a silica gel. He quickly realized this gel diffusion system mimicked how hydroxyapatite crystals grow in bones and teeth, giving them their hardness. Building on this observation, he and a colleague patented a method for repairing a tooth by growing hydroxyapatite crystals on the tooth’s surface.

A few years later, a young Japanese businessman named Shuji Sakuma, having just founded Sangi Co. Ltd. in Tokyo, obtained the patented research and set about turning it into a product with the help of dental professionals. Lessons learned from Rubin’s patented methodology inspired the company’s Apadent and Apagard toothpaste lines in the early to mid-1980s. Japan and many other governments now recognize hydroxyapatite as an anticavity agent, and studies have found it to have other benefits, like improving whiteness and reducing sensitivity.

https://www.nasa.gov/general/tech-today-semiconductor-research-leads-to-revolution-in-dental-care/

>>20526376

she zapped that hoochie