Ganymede’s surface is a bit of a puzzle for planetary scientists. About two-thirds of its surface is covered in lighter terrain, while the remainder is darker. Both types of terrain are ancient, with the lighter portion being slightly younger. The two types of terrain are spread around the moon, and the darker terrain contains concurrent furrows.
For the most part, scientists think that the furrows were caused by tectonic activity, possibly related to tidal heating as the moon went through unstable orbital resonances in the past.
But a new study says that a massive impact might be responsible for all those furrows.
Continue reading “A Huge Ring-Like Structure on Ganymede Might be the Result of an Enormous Impact”
A new and thorough analysis of high-resolution images and data from NASA’s Dawn mission have now provided fresh insights into the dwarf planet Ceres, with intriguing evidence that Ceres has a global subsurface salty ocean, and has been geologically active in the recent past.
Continue reading “It’s Starting to Look Like Ceres is an Ocean World, Too”
SpaceX has been making some exciting moves this summer. On May 30th, their Crew Dragon spacecraft launched on its historic Demo-2 mission, carrying astronauts Robert Behnken and Douglas Hurley to the ISS. They safely returned again on August 2nd, shortly after the SN5 prototype conducted the long-awaited 150 m (500 ft) hop test at the company’s launch facility in Boca Chica, Texas.
And now, in a move that mirrors what Virgin Galactic is doing at Spaceport America in New Mexico, SpaceX has committed to turning Brownsville – the town nearest to the Boca Chica facility – into its own spaceport. To this end, SpaceX recently posted a job application on its website where they announced they are seeking a Resort Development Manager. Potential applicants should follow the link if they think they’re up to the task!
Continue reading “SpaceX is Hiring People to Help Build a Resort at the Boca Chica Launch Facility”
What would we look for in a distant exoplanet in the hunt for Earth-like worlds, and perhaps life? A recent observation carried out by the Hubble Space Telescope found tell-tale signatures from our home planet by looking at a familiar source under extraordinary circumstances: Earth’s Moon, during a total lunar eclipse.
Continue reading “Hubble Examines Earth’s Reflection as an ‘Exoplanet’ During a Lunar Eclipse”
Stars form from the collapse of dense clouds of gas and dust, which makes it very hard for astronomers to watch the process unfold. Recently the ALMA telescope has revealed a treasure trove of embryonic stars in the Taurus Molecular Cloud, illuminating how baby stars are born.
Continue reading “Seeing baby stars at every stage of their formation”
Could lava tubes on the Moon and Mars play a role in establishing a human presence on those worlds? Possibly, according to a team of researchers. Their new study shows that lunar and Martian lava tubes might be enormous, and easily large enough to accommodate a base.
Continue reading “Lava Tubes on the Moon and Mars are Really, Really Big. Big Enough to Fit an Entire Planetary Base”
In 1987, astronomers witnessed a spectacular event when they spotted a titanic supernova 168,000 light-years away in the Hydra constellation. Designated 1987A (since it was the first supernova detected that year), the explosion was one of the brightest supernova seen from Earth in more than 400 years. The last time was Kepler’s Supernova, which was visible to Earth-bound observers back in 1604 (hence the designation SN 1604).
Since then, astronomers have tried in vain to find the company object they believed to be at the heart of the nebula that resulted from the explosion. Thanks to recent observations and a follow-up study by two international teams of astronomers, new evidence has been provided that support the theory that there is a neutron star at the heart of SN 1604 – which would make it the youngest neutron star known to date.
Continue reading “Astronomers Think They’ve Found the Neutron Star Remnant From Supernova 1987a”
The InSight lander is making progress on Mars. After many months of struggle and careful adaptation, the InSight lander’s ‘Mole’ is finally into the ground. There’s still more delicate work to be done, and they’re not at operating depth yet. But after such a long, arduous affair, this feels like a victory.
Continue reading “InSight’s Mole Is In!”
There’s a surprising phenomenon taking place in Mars’ atmosphere: during the spring and fall seasons on the Red Planet, large areas of the sky pulse in ultraviolet light, exactly three times every night.
Continue reading “The Martian Sky Pulses in Ultraviolet Every Night”
Magnetars are the ultimate aggressive star: intense magnetic fields, massive outbursts, the works. We’ve known that magnetars are capable of producing some of the most powerful blasts in the cosmos, but new observations reveal a different kind of radiation: radio waves. This could potentially solve the long-standing puzzle of the origins of the mysterious Fast Radio Bursts.
Continue reading “A magnetar has been discovered throwing off bizarre blasts of radiation. Is this where fast radio bursts come from?”