• A Week Inside Centauri Dreams

    No posts this week, as I am wrapping up an overhaul of some of the site’s internals. When I say ‘I,’ I really mean my brilliant web guru, whose team has worked tirelessly to fix a major problem with the archives. The problem has to do with special characters of the sort used often in scientific papers. An upgrade to the site software some months back caused many of these to render improperly, and fixing what seemed a simple issue has proven extraordinarily complex. As best I can tell, we now...

  • Finding Life Signs around Icy Moons

    Europa Clipper is scheduled to launch on October 10, with arrival at Jupiter in 2030. That will keep subsurface oceans on our minds as we tangle with the problems of analyzing water locked under kilometers of ice. Some moons, of course, help us out. Enceladus spews watery materials into space through cracks in its crust, making flybys through its geysers a possibility for snagging samples. Europa Clipper may find further evidence of the much less dramatic plume activity that has been spotted on...

  • Another Conundrum: How Long Do White Dwarfs Live?

    Don’t you love the way the cosmos keeps us from getting too comfortable with our ideas? The Hubble Constant (H0), which tells us about the rate of expansion of the universe, is still a hot issue because observations from both the Hubble Space Telescope and JWST don’t tally with what the European Space Agency’s Planck mission concluded from its data on the Cosmic Microwave Background (CMB). How exactly do we fine tune the standard model of cosmology to make sense of this? The so-called Hubble...

  • Free-Floating Planets as Interstellar Targets

    Just a few weeks ago I wrote about stellar interactions, taking note of a concept advanced by scientists including Ben Zuckerman and Greg Matloff that such stars would make for easier interstellar travel. After all, if a star in its rotation around the Milky Way closes to within half a light year of the Sun, it’s a more feasible destination than Alpha Centauri. Of course, you have to wait for the star to come around, and that takes time. Zuckerman (UCLA), working with Bradley Hansen, has...