Universe Today

May 16, 2023May 16, 2023 by Brian Koberlein

New Clues to the Formation of Globular Clusters: Their Ultramassive Stars

The scattered stars of the globular cluster NGC 6355 are strewn across this image from the NASA/ESA Hubble Space Telescope. This globular cluster lies less than 50,000 light-years from Earth in the Ophiuchus constellation. Image Credit: ESA/Hubble & NASA, E. Noyola, R. Cohen

Globular clusters are odd beasts. They aren’t galaxies, but like galaxies, they are a gravitationally bound collection of stars. They can contain millions of stars densely packed together, and they are old. Really old. They likely formed when the universe was only about 400 million years old. But the details of their origins are still unclear.

May 16, 2023May 16, 2023 by Andy Tomaswick

NASA Shuts Down the Lunar Flashlight Mission After it Fails to Go into Orbit

NASA missions can be categorized into two types. One type includes headline-grabbing missions, such as the JWST or New Horizons, that take decades to design and plan. Typically those larger missions include many flight-tested components that had already been used on other missions in the past. They are intended to conduct science experiments. But those components get tested beforehand on what the agency calls “technology demonstration” flights. These are intended to work through the kinks in technology development that might hinder the use of a system in space. Lunar Flashlight was one of those technology demonstrator missions, but unfortunately, one of the critical novel components did run into one of those kinks, and now NASA has decided to shut down the mission.

May 16, 2023May 16, 2023 by Nancy Atkinson

NASA Tests a Robotic Snake That Could Explore Other Worlds

A snake-like robot called EELS is tested at a ski resort in Southern California to determine how well it can traverse across snowy environments. Credit: NASA/JPL/Caltech.

Rovers have enabled some amazing explorations of other worlds like the Moon and Mars. However, rovers are limited by the terrain they can reach. To explore inaccessible terrain, NASA is testing a versatile snake-like robot that could crawl up steep slopes, slither across ice, and even slide into lava tubes. Called Exobiology Extant Life Surveyor (or EELS), this robot could cross different terrains and create a 3D map of its surrounding to autonomously pick its course, avoiding hazards to reach its destination.

May 16, 2023May 16, 2023 by Nancy Atkinson

Hurray! Juice Deploys its Stuck Antenna

One of the stuck parts of Juice's RIME antenna deploys. Credit: ESA/Juice mission.

ESA’s Juice mission launched last month on April 14, beginning its long journey to explore Jupiter’s icy moons, Ganymede, Europa, and Callisto. But soon after launch, mission controllers realized a 16-meter (52.5 ft)-long antenna for a radar instrument was jammed and couldn’t deploy. The Radar for Icy Moons Exploration (RIME) antenna is mission critical, as it gathers data for the instrument that will be able to map beneath the ice at these moons.

But, whew, the story has a happy ending. After nearly a month of efforts to free the stuck antenna, engineers figured out a fix for the RIME antenna. They fired a mechanical device in the jammed bracket, which created enough jiggling and rattling to allow the antenna to fully deploy.

May 15, 2023May 15, 2023 by Andy Tomaswick

NASA is Getting Serious About Building and Assembling Future Missions… in Space

Most people involved in some product development have had a lousy supply chain experience at least once in their careers. It would be so much easier if all the parts needed to make your product were available nearby and didn’t take much effort to get to you. That is especially true if you happen to be making your product in space – one of the most significant hurdles to developing a fully-fledged space economy is the difficulty (i.e., cost) of getting those products into space.

NASA knows this and realizes that the ability to assemble and even build some of its missions directly in space would be far superior to its current methodology of building and testing everything on Earth, then launching it into space and hoping it doesn’t blow up on the way. That is a pipe dream for now, but NASA can make dreams a reality if it sets its collective mind to it. It has certainly put its mind to making things in space and has taken the first step toward doing that by setting up a new consortium for In-space Service Assembly and Manufacturing (ISAM).

Continue reading NASA is Getting Serious About Building and Assembling Future Missions… in Space“

May 15, 2023May 12, 2023 by Paul M. Sutter

What Cassini’s “Grand Finale” Taught Us About Saturn’s Interior

Six years ago the Cassini spacecraft, which had spent nearly two decades in orbit around Saturn, finished its mission with a grand finale, plunging itself into the depths of Saturn’s atmosphere. Those last few orbits and the final plunge revealed a wealth of information about Saturn’s interior. A team of astronomers have collected all of the available data and are now painting a portrait of the interior of the solar system’s second largest planet.

May 15, 2023May 15, 2023 by Evan Gough

62 New Moons Found for Saturn

The Hubble Space Telescope captured this image of Saturn in February, 2023. Image Credit: STScI

Jupiter is the King, Earth is teeming with life, Venus is a weird, spacecraft-crushing hellhole, and now Saturn has the most moons. Again.

Jupiter sat atop the podium as the planet with the most moons for a while. But with the discovery of 62 more moons, Saturn has surpassed Jupiter as the planet with the most natural satellites and reclaimed the top spot.

May 15, 2023May 15, 2023 by Andy Tomaswick

ESA Wants Your Ideas for Living off the Land… on the Moon

Challenges have been a mainstay of space exploration for several years at this point. In the past, they have ranged from making a potential space elevator to designing a solar power system on the Moon. The European Space Agency is continuing that tradition and has recently released a new challenge focusing on lunar resources. Called the Identifying Challenges along the Lunar ISRU Value Chain campaign, this new ESA platform is the next step in the agency’s efforts to develop an entire “value chain” of in-situ resource utilization (ISRU) technologies.

May 15, 2023May 15, 2023 by Brian Koberlein

Two Super-Earths Found Orbiting a Red Dwarf Star at the Edge of the Habitable Zone

Illustration of NASA's Transiting Exoplanet Survey Satellite. Credit: NASA's Goddard Space Flight Center

NASA’s Transiting Exoplanet Survey Satellite, or TESS, was designed to find other worlds. Following in the tradition of the Kepler spacecraft, TESS has a hundred thousand stars looking for small but regular dips in their brightness. These dips are typically caused by planets as they pass in front of the star. TESS has been quite effective, logging nearly 6,000 candidate exoplanets. Confirming or rejecting these candidates takes time, but it has led to some interesting discoveries.

May 15, 2023May 15, 2023 by David Dickinson

The Moon Occults Jupiter Wednesday Morning for North America

Wednesday's occultation, as Jupiter approaches the Moon. Credit: Stellarium.

Be sure to set your alarm for early Wednesday morning, as the Moon occults the King of Planets.

If you watch the sky long enough, even the most improbable events are bound to coincide. Just such a strange occurrence happens this Wednesday morning, when the Moon occults (passes in front of) Jupiter as seen from our Earthly vantage point… with a bizarre telescopic twist.