concerning the uniqueness of Earth

Is Earth totally unique? Perhaps it is, as reported by a recent study covered in a few places.

This would be kind of sad, in a way. No aliens to meet, and no other planets like the Earth… an awful waste of space, as Carl Sagan called it. It’s also an odd idea, philosophically, because for hundreds of years astronomers have considered the Earth as nothing particularly special (the “Copernican Principle” from the article). This idea has been backed up by discoveries that the laws of physics and the laws of chemistry are the same everywhere in the universe… If that’s true, there should be nothing preventing the processes that formed the Earth from happening somewhere else.


on Steven Hawking’s new theory of black holes

As has been recently reported online, (well, in some places, and confusingly in others), Stephen Hawking and his collaborators have a new theory (see also this brief, more easily understandable synopsis) about black holes that might solve one of the more serious problems with their existence. Basically, Hawking is trying to solve a problem he…

on Gravitational Waves

Light waves are a fundamental way we interact with and understand the universe. It’s what our eyes see, and it was the first thing we saw through a telescope. In fact, when it comes to astronomy, light waves (whether gamma rays, X-rays, UV, optical, infrared or radio) are basically the ONLY way we can detect…

on the objects orbiting KIC 8462852 and the things they might be (Part 3)

The mystery of KIC 8462852 (or Tabby’s Star), the Kepler star with unusual structures apparently in orbit discovered by Yale’s Tabetha Boyajian, continues… I’ve covered it twice before, but practically every day a new paper appears on the astronomical preprint server examining one aspect of Tabby’s Star or another, all with the same intent: figure…