Tag: Space

97% of the observable universe is forever unreachable

The other day, I was reading a post by Ethan Siegel on his excellent blog, Starts With a Bang, about whether it makes sense to consider the universe to be a giant brain.  (The short answer is no, but read his post for the details.)  Something he mentioned in the post caught my attention. But … Continue reading 97% of the observable universe is forever unreachable →

Why alien life will probably be engineered life

Martin Rees has an interesting article at Nautilus: When We Find Aliens, We Might Find Something Like the Borg This September, a team of astronomers noticed that the light from a distant star is flickering in a highly irregular pattern.1 They considered the possibility that comets, debris, and impacts could account for their observations, but each of … Continue reading Why alien life will probably be engineered life →

Snowden’s answer to the Fermi Paradox and its assumptions

The Fermi Paradox is the question that, if the conditions for life in the galaxy are as ubiquitous as they appear to be, so that there should be hundreds, if not thousands of alien civilizations out there, then where is everyone?  Why have we found no evidence for any for those civilizations?  And why aren't they here? … Continue reading Snowden’s answer to the Fermi Paradox and its assumptions →

‘The Martian’: Robinson Crusoe meets Apollo 13

I recently read Andy Weir's novel: 'The Martian'.  Weir's book is a self publishing success story.  An admitted life long geek, he enjoyed thoroughly researching how a mission to Mars might work and what might go wrong with it.  He originally published the book, in serialized form, on his web site.  In response to reader … Continue reading ‘The Martian’: Robinson Crusoe meets Apollo 13 →

NASA has never accidentally sent a probe into the Sun.

Last week, I was having lunch with some friends, which included a number of programmers.  One of them mentioned an old urban myth, that I hadn't heard in several years, which claims that, due to a programming bug (involving a misplaced semicolon), NASA once accidentally sent a probe into the Sun.  I pointed out to my friend how implausible this was. … Continue reading NASA has never accidentally sent a probe into the Sun. →

The problems with ensuring humanity’s survival with space colonies

Stephen Hawking, as he has done before, expresses a common sentiment, that we need to colonize space in order to survive. Humans should go and live in space within the next 1,000 years, or it will die out, Stephen Hawking has warned. "We must continue to go into space for the future of humanity," Mr … Continue reading The problems with ensuring humanity’s survival with space colonies →

G-HAT (Glimpsing Heat from Alien Technologies)

For those interested in the post about finding advanced civilizations in other galaxies by their heat emissions, Paul Gilster at Centauri Dreams has a write up about the study, including links to additional material as well as the actual paper. I found that this part clarified the seeming contradiction in the Science Daily article. The currently reported work … Continue reading G-HAT (Glimpsing Heat from Alien Technologies) →

Searching for advanced civilizations in other galaxies: 50 possible candidates found?

At first, this article seems like a bit of a downer: Search for advanced civilizations beyond Earth finds nothing obvious in 100,000 galaxies -- ScienceDaily. After searching 100,000 galaxies for signs of highly advanced life, a team of scientists has found no evidence of advanced civilizations there. The idea behind the research is that, if … Continue reading Searching for advanced civilizations in other galaxies: 50 possible candidates found? →

Dark energy may be less energetic than previously thought

This is interesting.  Astronomers discovered dark energy, the energy causing the rate of expansion rate of the universe to speed up, by looking at large numbers of Type 1a supernovae. Type 1a supernovae are white dwarfs (collapsed stars after their fusion has gone out) that explode.  What causes a previously stable white dwarf to explode? … Continue reading Dark energy may be less energetic than previously thought →