Tag Archives: gravity

NASA Moves Up Psyche Mission Timetable

Image courtesy Space Systems Loral/Arizona State University/Peter Rubin

NASA’s mission to 16 Psyche, the solar system’s only known iron-nickel asteroid, will launch in the summer of 2022, one year earlier than originally planned.

Read/listen to my full story at KJZZ’s Arizona Science Desk:
NASA’s Psyche Mission Will Launch a Year Early, Arrive at Target Four Years Sooner

A GRaND Discovery: Dwarf Planet Ceres is Well-Stocked With Water


After 4 billion years, the dwarf planet Ceres is still carrying a surprising amount of water weight — as much as 30 percent.

The finding, which was published in the Jan. 6 edition of the journal Science, is consistent with earlier models, and provides valuable clues to how Ceres formed.

Read/listen to my full story at KJZZ’s Arizona Science Desk:
Dwarf Planet Ceres Up To 30 Percent Water

What Holds Dead Galaxies Together?

Seven to 10 billion years ago, a bunch of galaxies fell in with a bad crowd at the Coma cluster — a galactic group comprising thousands of their ilk. That crash “quenched” the ill-fated galaxies. They’d never again burn with hot, young stars. But the crash should have done more than shut down the unfortunate galaxies’ stellar birth rate. It should have strewn their stars across space.

So what kept these cosmic corpses intact? Read on, if you dare (OK, so the title is a bit of a hint …).

Dead Galaxies Indebted to Dark Matter

There was Madness to Their Method: The Western World Before the Scientific Method

Cartoon of Mary Toft's doctors.
“My money’s on a lop-eared doe, or perhaps a Britannia Petite.”

One of the many things I enjoy about teaching my university class, Science, Feuds, Scandals and Hoaxes, is the opportunity to explore some of the most outrageous ideas ever to gain traction in the public mind. It’s easy to make fun today, but some of these ideas were grounded in reasoning that, though flawed, eventually gave rise to the right answer. Then again, there’s really no defending those doctors who thought that woman was giving birth to rabbit parts.

10 Things We Thought Were True Before the Scientific Method

The Other Grand Tour: 10 Stunning Space Stopovers

Fomalhaut b
Image courtesy NASA/ESA.

Cosmos is back, and Neil deGrasse Tyson is tooling around the universe in Carl Sagan’s Ship of the Imagination. But suppose someone handed you the proverbial keys? Where in space and/or time would you go?

If you don’t have a ready answer, never fear. I’ve put together an itinerary that can’t fail, whether your tastes run to science or sightseeing. Sure, we might have to break a few physical laws and grow a few extra senses along the way but, hey, it’s not called the Ship of Literal Reality, is it? So hang your fuzzy planets from the rearview and strap in for a star-spanning tour, a jaunt from the local neighborhood to the unreachably distant (and disproportionately dangerous) corners of the universe, en route to…

10 Space Landmarks We’d Like to Visit