Sometimes it's amazing how much settled science, even something as longstanding as the size of our galaxy, can get called into question: The Milky Way May be 50 Percent Bigger Than Thought : Discovery News. A ring-like filament of stars wrapping around the Milky Way may actually belong to the galaxy itself, rippling above and below … Continue reading The Milky Way May be 50 Percent Bigger Than Thought
Tag: Milky Way
Gravitational waves discovery now officially dead
I tweeted this yesterday, but it deserves a blog entry: Gravitational waves discovery now officially dead : Nature News & Comment. A team of astronomers that last year reported evidence for gravitational waves from the early Universe has now withdrawn the claim. A joint analysis of data recorded by the team's BICEP2 telescope at the South … Continue reading Gravitational waves discovery now officially dead
Complex life in the universe may be much rarer than previously thought
At least, according to a couple of astrophysicists: Complex life may be possible in only 10% of all galaxies | Science/AAAS | News. The universe may be a lonelier place than previously thought. Of the estimated 100 billion galaxies in the observable universe, only one in 10 can support complex life like that on Earth, a … Continue reading Complex life in the universe may be much rarer than previously thought
Cosmic inflation appears to have shifted from settled science back to speculation
You can get background on what I'm talking about in this post here and here. Probably the best thing to do is let the experts weigh in on this. https://twitter.com/DavidSpergel/status/513848952513642497 https://twitter.com/seanmcarroll/status/513858867327823873 https://twitter.com/seanmcarroll/status/513869684647530496 https://twitter.com/AstroKatie/status/514040997139865600 It's interesting to note that the empirical evidence from BICEP2 has never been called into question, only the interpretation of that evidence. … Continue reading Cosmic inflation appears to have shifted from settled science back to speculation
Video on Laniakea supercluster
I reported on this yesterday, but Nature has put out a video with more information that is well worth checking out. As a bonus, it demonstrates how to pronounce Laniakea! http://www.youtube.com/watch?v=rENyyRwxpHo h/t Matthew Cobb at Why Evolution Is True
Your cosmic address: The edge of the Laniakea supercluster
This is pretty cool: New Map Locates Milky Way in Neighborhood of 100,000 Galaxies. A new map of the Milky Way's cosmic neighborhood shows where our galaxy lives in relation to thousands of others nearby, with scientists giving the newly discovered "supercluster" of galaxies a name: Laniakea, which means "immeasurable heaven" in Hawaiian. Throughout the universe, … Continue reading Your cosmic address: The edge of the Laniakea supercluster
The Fermi Paradox – Wait But Why
The "Wait But Why" blog takes an in depth look at something some of us were discussing on another thread: the Fermi Paradox. Everyone feels something when they’re in a really good starry place on a really good starry night and they look up and see this: Some people stick with the traditional, feeling struck … Continue reading The Fermi Paradox – Wait But Why
Growing doubt that gravitational waves were actually detected
Nature has an article up describing the problems with the BICEP2 results that are now being identified by various scientists. It's actually the second one I've seen them publish on this. The astronomers who this spring announced that they had evidence of primordial gravitational waves jumped the gun because they did not take into proper … Continue reading Growing doubt that gravitational waves were actually detected
You say multiverse, I say galaxies
Corey Powell has an interesting post up on what he calls the Four Great Eras of Exploration. The first era was Galileo's discovery of the vastness of the universe, the second that stars were composed of chemical elements, and the third was Hubble's discovery of other galaxies. The fourth, and main topic of his post, … Continue reading You say multiverse, I say galaxies
Why is the solar system flat?
Machines Like Us and others linked to this cool video explaining why the solar system is flat. http://www.youtube.com/watch?v=tmNXKqeUtJM I'm not entirely sure the four dimensional stuff was necessary, although it was interesting. One thing to realize though, is that while the solar system is flat, it's not flat in the same orientation as other solar systems, … Continue reading Why is the solar system flat?
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