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"Stuff that's hidden and murky and ambiguous is scary because you don't know what it does." -Jerry Garcia
Earlier this month, one of my favorite musical artist of all-time would have turned seventy. This weekend, I'm off at a fantastic music festival where they're celebrating the life of Jerry Garcia, and in addition to being the leader of the Grateful Dead, he was also a huge influence in the world of bluegrass, americana and folk music. While I always loved his songs about lovable scoundrels, here's a duet of him with David Grisman performing the much more pastoral
Shady Grove,
and…
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"Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people." -Carl Sagan
Our night sky, quite literally, is our window to the Universe.
Image credit: Miloslav Druckmuller, Brno University of Technology.
Well, it's kind of a window to the Universe. I say only "kind of" because, with the exception of those two faint, fuzzy clouds in the lower right, everything else visible in the image above is part of our own Milky Way galaxy. In fact, practically…
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"I am looking at the future with concern, but with good hope." -Albert Schweitzer
As you all know, the most ambitious interplanetary mission ever attempted -- Mars Science Laboratory -- successfully landed its Curiosity rover on Mars earlier this week. Last night, I had the opportunity to go on my local news and speak a bit about it, and as always, it was an absolute pleasure.
(Video credit: KGW / Ben Lacy / Carey Higgins / Steph Stricklen.)
Of course we got to talk about the rover itself and its science potential, and exactly how much more sophisticated it is than any of its martian…
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“We are much closer today to being able to send humans to Mars than we were to being able to send men to the moon in 1961, and we were there eight years later. Given the will, we could have humans on Mars within a decade.” -Robert Zubrin
This is what we can accomplish when we invest in something big.
Image credit: NASA / JPL-Caltech / Mars Science Laboratory.
I'm not talking about the Olympics, of course. I'm talking about investing in science, in exploration, in robotics, in engineering, in technology, and in humanity, and what can we accomplish?
Image credit: Mars Curiosity / NASA / JPL…
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"How old would you be if you didn't know how old you are?" -Satchel Paige
Today marks another year and another trip around the Sun for me. For you, and me, and everything on Earth that makes it through another year on this world, there's a whole lot we get to experience.
Image credit: NASA / ISS Expedition 13.
Some things are tiny: the Earth's rotation slows by about two millionths of a second each year, while some are large: we hurtle over 900 million kilometers in outer space as we orbit around the Sun. Our Earth spins just over 366 times on its axis, while our one revolution around…
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"Ignignokt: Well well, I know that. I said that, but it's his nap time now.
Err: 'Cause he like, sleeps during the day.
Ignignokt: But at night he feeds.
Err: And it's always night on the Moon!
Ignignokt: Don't f*** with me, Err." -Aqua Teen Hunger Force, Moon Master
Ahh, the Moon. The brightest object in our night sky is familiar to all inhabitants of Earth, and during its full phase, easily outshines everything else in the night sky, combined.
Image credit: Furious Photos -- Amazing pictures by a delusional hack.
Capable of casting strong shadows, and easily…
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"Black holes, which have no memory, are said to contain the earliest memories of the universe, and the most recent, too, while at the same time obliterating all memory by obliterating all its embodiments. Such paradoxes characterize these strange galactic monsters, for whom creation is destruction, death life, chaos order." -Robert Coover
Our Milky Way, the swath of light and dark that dominates the darkest skies here on Earth, contains a huge variety of stars: large and small, red and blue, from young to old to ancient.
Image credit: ESO / Serge Brunier, Frederic Tapissier, The World At…
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"Arithmetic! Algebra! Geometry! Grandiose trinity! Luminous triangle! Whoever has not known you is without sense!" -Comte de Lautréamont
When you think about it, it's amazing that our physical Universe makes sense at all. The fact that we can observe what's happening, determine the laws that govern it, and predict what will happen under the same or similar circumstances is the most remarkable power that science has. If that's what you're doing in any aspect of your life, congratulations, you are a scientist. But that doesn't tell us, fundamentally, what the Universe is like at its most basic…
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"Nothing exists except atoms and empty space; everything else is just opinion." -Democritus of Abdera
When you take a look out at the Universe, past the objects in our own solar system, beyond the stars, dust and nebulae within our own galaxy, and out into the void of intergalactic space, what is it that you see?
Image credit: BRI composite-image of the FORS Deep Field, ESO, VLT.
What we normally think of as the entire Universe, consisting of hundreds of billions of galaxies, with about 8,700 identified in the tiny patch of deep-sky shown above. Each one of those galaxies, itself…
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"If you don't like what you're doing, you can always pick up your needle and move to another groove." -Timothy Leary
Up in the night sky, shortly after sunset, the night sky holds some spectacular sights. Some are permanent, some are transient, some have been known for thousands of years, and some are still being discovered. Looking to the west after sunset tonight, this is what you're likely to see.
Image credit: Me, using Stellarium, available free at http://stellarium.org.
The Big Dipper, perhaps the most famous collection of seven stars in the night sky, looms large over the horizon. As…
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"Each generation goes further than the generation preceding it because it stands on the shoulders of that generation. You will have opportunities beyond anything we've ever known." -Ronald Reagan
Earlier today, Sally Ride, the first American woman ever to fly in outer space, passed away at the age of 61 from pancreatic cancer. To many different people, her life, her achievements, and her death means a great diversity of things. To anyone with a love of outer space, human exploration, and achieving your dreams, her story will likely resonate with you, too. I'd like to share with you what are,…
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"The achievements of Apollo were so bold and our subsequent efforts so timid that the energy of those years seems like a youthful dream." -Buzz Aldrin
43 years ago today, humanity took our first steps on another world, venturing nearly 400,000 kilometers from home and walking on the surface of the Moon.
Image credit: NASA, Apollo 11, photo by Neil Armstrong.
Of course, what we found there was a world whose soil was very similar to our own, but devoid of any atmosphere, liquid, or signs of life, present or past. But out beyond the Moon, visible in the distance even when viewed from Earth,…
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This is an enhanced version (with some upgraded images and text) of an article I first wrote over two years ago. It is just as valid today as it was back then, only today, I have a special offer to go with it. Next week, a bunch of cosmologists and myself are getting together and all writing about dark energy. And I want you to have your say.
So at the end of this post, ask your dark energy questions. Ask anything and everything you ever wanted to know about dark energy. I'll choose the best one (or, space & time permitting, more than one) and write a special post on it for you then.…
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"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge." -Stephen Hawking
The Universe is a vast, seemingly unending marvel of existence. Over the past century, we've learned that the Universe stretches out beyond the billions of stars in our Milky Way, out across billions of light years, containing close to a trillion galaxies all told.
Image credit: NASA, ESA, S. Beckwith (STScI) and the HUDF Team.
And yet, that's just the observable Universe! There are good reasons to believe that the Universe continues on and on beyond the limits of what we can see; the…
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"So when the cat has got your tongue, there's no need for dismay!
Just summon up this word and then you've got a lot to say!
Pick out those eighteen consonants and sixteen vowels as well,
And put them in an order which is very hard to spell..."
-Supercalifragilisticexpialadocious, The Sherman Brothers
There's something mysterious about foreign languages that we do not speak; the word barbarian comes from the ancient Greeks, who thought that the speech of the Medes and Persians sounded like "bar bar bar" to them. While we might be quick to dismiss such sounds as gibberish, Italian…
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"For most of the history of our species we were helpless to understand how nature works. We took every storm, drought, illness and comet personally. We created myths and spirits in an attempt to explain the patterns of nature." -Ann Druyan
Here on Earth, we are well aware of how devastating storms can be. From hurricanes to flash floods, an unpredictable change in weather can turn a serene setting into a catastrophe in no time at all. The clouds that fill the skies can often portend what type of weather is coming, and to me, the most impressive and fearsome of all is the rare and remarkable…
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"It suddenly struck me that that tiny pea, pretty and blue, was the Earth. I put up my thumb and shut one eye, and my thumb blotted out the planet Earth. I didn't feel like a giant. I felt very, very small." -Neil Armstrong
Here on our little wet rock in our Solar System, we often remind ourselves what a small world Earth actually is. The farther out in space we reach, the more this appears to be true.
Image credit: NASA / Apollo 11, taken by Command module pilot Michael Collins.
The Earth is the largest of the four inner, rocky planets in our Solar System, at more than 12,000 km in…
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"You better lose yourself in the music, the moment
You own it, you better never let it go
You only get one shot, do not miss your chance to blow
This opportunity comes once in a lifetime yo" -Eminem
Here on Earth, a cold, frozen winter lasts three months, with the Sun's rays pointed a maximum of 23.5 extra degrees away from your part of the Earth from normal.
On Mars, however, winters are even more severe.
Image credit: Calvin J. Hamilton.
With a slightly more severe axial tilt than Earth, an extra 78 million kilometers separating it from the Sun than our planet, and the coldest…
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"Even if there is only one possible unified theory, it is just a set of rules and equations. What is it that breathes fire into the equations and makes a universe for them to describe?" -Stephen Hawking
After a long search spanning more than my entire lifetime (so far), the Higgs boson has finally been discovered at both detectors -- CMS and ATLAS -- at the Large Hadron Collider at CERN.
Image credit: CERN / Particle Physics for Scottish Schools.
For a little more on this, check out the earlier posts here celebrating Higgs week:
The Biggest Firework of them all: The Higgs
How the…
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"We knew that we had indeed done something that was very different and very exciting, but we still didn't expect it to have something to do with physical reality." -Gerald Guralnik, co-developer of the Higgs mechanism
Might as well make this entire week "Higgs week" here on Starts With A Bang, given how important yesterday's discovery/announcement was! It isn't every day, after all, that you see a theoretical physicist on the 7PM news. (Video here.)
Image credit: KGW.com.
(So proud of Portland, OR's local TV station, KGW NewsChannel 8, for being willing to promote science to the whole city…