How long a star can stay shining depends on how massive it is - but it probably works the opposite way to how you’d expect! Even though less massive stars have a lot less hydrogen fuel to burn*, they still last much longer than more massive stars. How does that work?
It’s all because more massive stars have stronger gravity, which pulls them in tighter and compresses the core more. This raises temperatures and pressures in the star’s core, causing the nuclear fusion which powers the star to happen faster - much faster. More massive stars have more fuel, then, but they’re burning it much, much faster than less massive stars are, and will run out sooner. It’s a bit like a spendthrift millionaire spending all his money in one go vs. a careful student carefully budgeting every penny she spends. The millionaire will go broke faster.
The Sun has a predicted lifetime of around 11 billion years or so (so it has another 6 or so billion years left), but very massive stars (~40 times the mass of the Sun) can only live for one million years! And the least massive stars - tiny, dim, red dwarf stars only 80 times more massive than Jupiter - can stay shining for over a trillion years! That’s far, far longer than the age of the Universe, which means the earliest red dwarfs to form after the Big Bang are still with us and will be around long after our Sun is gone - and after several new generations of Sun-like stars have been able to form, live their lives and die as well!
From today, all of CERN’s official communication channels are switching to exclusive use of the font Comic Sans. The move comes after weeks of deliberation by CERN management and top web designers about how best to update the image of the laboratory for this, its 60th anniversary year.
"This is an important year for CERN and we wanted to make a bold visual statement," says CERN Head of Communications James Gillies.
"We thought the most effective way to communicate our research into the fundamental structure of matter at the very boundaries of technology was by changing the font." For Gillies, Comic Sans says: ‘This is a serious laboratory, with a serious research agenda.’ - "And it makes the letters look all round and squishy," he adds.
“The press still thinks [global warming] is controversial. So they find the 1% of the scientists and put them up as if they’re 50% of the research results. You in the public would have no idea that this is basically a done deal and that we’re on to other problems, because the journalists are trying to give it a 50/50 story. It’s not a 50/50 story. It’s not. Period.”—Neil deGrasse Tyson, podcast interview (via fourteendrawings)
“The business of skepticism is to be dangerous. Skepticism challenges established institutions. If we teach everybody, including, say, high school students, habits of skeptical thought, they will probably not restrict their skepticism to UFOs, aspirin commercials, and 35,000-year-old channelees. Maybe they’ll start asking awkward questions about economic, or social, or political, or religious institutions. Perhaps they’ll challenge the opinions of those in power. Then where would we be?”—Carl Sagan, The Demon Haunted World: Science as a Candle in The Dark (via thedragoninmygarage)
Atoms are small. Really small. One million of them in a row could safely hide behind a human hair; ten million could fit between the ridges on a postage stamp. If an apple were magnified to the size of the Earth, its atoms would be the size of that original apple. There are more atoms in a grain…
Hello everyone. This has been a little project of mine over the past few days
I hope you all enjoy this listing, and share it around. Share all the science. :3
I will be editing this from time to time and I’ll keep a link to it on my blog so you can find it easily.
This is not meant to be a list of all science blogs on tumblr. Only all the ones I follow (which is still a lot but definitely not all). The blogs listed are all active as well (within the past few weeks).
If you are not on the list and want me to check out your blog, send me a message. I may or may not follow you
I categorized each blog by scientific field:
Anthropology, Astronomy, Biology, Botany, Chemistry, Engineering/Technology, Environmental Science, General Science, Geography, Geology, Mathematics, Medical, Paleontology, Physics and Zoology
If you’re not happy with the section I put you in, send me a message and I’ll make an edit. I had to make quick decisions on hundreds of blogs, I’m only human.
Its a LONG post, so it might be easier to just search for the field you’re interested in.