Category Archives: astronomy

Doomsday Fun and Games

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the_universeI’ve been wondering why over the last day or two I’ve been getting email about various apocalyptic scenarios. I’ve now figured out why, I think. On Tuesday, several scientists, myself included, played with the idea of how to destroy the earth! Well, it was on the History Channel in an episode of the show the Universe, (it was recorded back in June and July) entitled “Ten Ways to Destroy the Earth”. Of course, these are not scenarios we envision happening any time soon, but rather an excuse to talk about various kinds of science (from spontaneous symmetry breaking and the early universe, through planetary science, solar physics, and of course black holes and more). We list various favourite ways that were chosen to be discussed, and each physicist (although they called me an astrophysicist) picks a favourite. Fun stuff.

I chose putting a huge amount of antimatter at the core of the earth and letting it […] Click to continue reading this post →

Laser is Coming Soon!

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Well, here it is. After lots of interruptions over the last 24 hours, I give you the trailer for Laser, the next of my films. I think it is a bit more playfully enigmatic than the trailer for the first film. (I’ve only just (half an hour ago) finished recording the music for it, and so it really is being rushed to you straight from the cutting room, as it were.)

See earlier posts for my thoughts about the project, and see the trailer for the first film here, and the actual first film, Shine a Light, here. Sorry it is so late… the semester started and I got swamped. See my chatter about that here.

Anyway, here it is! Enjoy!

-cvj

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Ten Things That Go Boom!

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the_universeWell, ok… Boom is not quite accurate, but the idea is that there will be ten kinds of blasts/explosions/major_energetic_events discussed tonight on the History Channel’s The Universe:

The Universe is full of explosions that both create and destroy. The Chicxulub impact on the Yucatan peninsula, which may have wiped out the dinosaurs 65 million years ago, was two million times more powerful than the largest nuclear bomb ever detonated on Earth. But guess what? That’s only good enough for the very bottom of the Biggest Blasts top ten list. This episode works its way up through supernova explosions and gamma ray bursts all the way to the blast that started it all–the Big Bang.

Sounds good doesn’t it? There’s a lot of good people contributing again, so I know it’ll have some good material and explanations.

In addition, I’m reasonably confident I play a role in this one…This one was a blast (sorry) to film. You saw some posts earlier reporting on some of the filming. Assuming they used the material I did with them, you’ll get to see why I was at the […] Click to continue reading this post →

It Fell From Space…

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the_universeTonight’s 9:00pm episode of the History Channel’s The Universe ought to be interesting. It is all about objects that fall to earth from space. It’s a good opportunity to learn things about the universe (both near and far) from the perspective of things we glimpse arriving here on earth. You’ll get to learn about the earth as well, and how it (and life on it) has been affected by these things. There’ll be asteroids and planetary science of course, and maybe other things. I know from hearing some chatter of the program makers that there’ll be lots of demos using impacts and collisions and so forth. I know some good people were involved in making it, such as the writer/director Laura Verklan, and my friend and fellow regular on the show, JPL’s Amy Mainzer (who has an excellent blog here). […] Click to continue reading this post →

Mount Doom?

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Continuing my series of posts on the approach of the fires to Mount Wilson and the threat to the Observatory (see previous for information and discussion – this morning I am happy to hear that the radio news is now mentioning the Observatory and not just the tv and radio antennae up there)… Last night at about midnight I decided to look out to see whether I could see anything going on, and was greeted with a sight from the pages of Tolkien describing Orodruin (Mount Doom):

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You can see the flames in the canyons near Mount Wilson’s summit, and as I watched […] Click to continue reading this post →

Wish the Observatory Good Luck!

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60 inch at mount wilson The fires are racing up the sides of Mount Wilson as I write (19:38). They expect the burn to get to the top sometime in the next few hours, and yes, I imagine it’ll affect the Mount Wilson Observatory in some way.

[Update (20:59): You can get regular updates from the director at this page*. Seems that fire crews will remain on site for when/if the fires sweep through the grounds. ]

All of the working scientific equipment, including the solar telescopes and of course the historic telescopes (the 60 inch is pictured to the right) with which astounding discoveries were made about our universe (such as the fact that it is expanding, and the fact that the universe is vastly more than just our Milky Way Galaxy) are presumably in some danger, as well as support buildings of various kinds. I’ve no idea how much since I do not know what fire-proofing measures are in place up there, although I am sure there are several – such as keeping brush away from the buildings themselves. Here’s a camera up there on one of the solar telescopes where you can see regularly updated pictures that it snaps. I grabbed this one just now (click for larger view):

solar_tower_camera

So keep your fingers crossed for luck for the instruments, and of course for all […] Click to continue reading this post →

Smoke

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fire_sunriseThere’s a remarkable amount of smoke in the skies here in Los Angeles. Strangely there is little or no wind to accompany this super-hot day, and so the smoke is largely staying over the region where the fires are – the San Gabriel mountains, North of La Canada, Altadena, etc.

There was a bit of movement of the smoke overnight, and early this morning (while the sun shone dull and red like a sunset instead of a sunrise) there was some ash fall over where I live (I was working outside on some writing while it was still cool), a good number of miles away from the fires, in the city of Los Angeles itself, but this seems to have gone away. So there are clear skies in all directions, and then ominous-looking mushroom clouds in one direction. It is odd. This stillness is the reason the firefighters are having a lot of difficulty fighting the fires, actually – the smoke is affecting visibility for the various ground and airborne crews. There’s a lot of concern about what the fires will do next, (including a threat to the Mt. Wilson Observatory) and so let’s all keep out fingers crossed for luck. [Update: 6:30pm – I’ve heard that they have no choice but the let the fires take Mount Wilson. I hope that the Observatory survives ok. If you’re not familiar with the significance of the Mount Wilson Observatory, read here and here.]

Here’s a recent (about 5:00pm today) shot of the mushroom clouds of smoke. You can […] Click to continue reading this post →

The Universe: Season 4

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the_universeI learned* a short while ago that the fourth season of The Universe on the History Channel starts tonight! As you may have read from a number of posts of mine over the last couple of months (see e.g. here, here and here), there’s been a lot of filming for this new cluster of episodes. I actually thought it was all going to start airing in the Fall, so this is a surprise to me.

There are some fun topics coming up in this season. There’ll be plenty of interesting things to learn, with contributions from a variety of interesting scientists telling you […] Click to continue reading this post →

Meaty Meteor Watch

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I’m 24 hours too late to warn you of the peak, which was this morning, but I imagine it will still be very good over the next few nights. This is the Perseid meteor shower. Apparently it is very good this year. So wander out when it is dark enough and see what you can see. Look toward Perseus, of course. More information here, from the Meteor blog, and the ever-excellent Stardate site gives you some directions (or look here).

In a big city like Los Angeles? Don’t automatically believe the lazy excuse that […] Click to continue reading this post →

Shine a Light

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It is Friday, so time for a film release. So, get your popcorn, your ice-cold drink, and find your comfy chair! It has been a long time coming (see related posts listed below), but finally the first of the series of films I’ve been talking about is ready for you!

But before I run the projector, let me say a few words. As I said before, this short film is (I hope) fun, engaging, and informative. I hope lots of people take the time to watch it at least a couple of times. A basic scientific knowledge of the world is for everyone. Science is part of our culture and should be more widely circulated. Films such as this is one of the ways the National Science Foundation, who provided the support to make it, is helping to bring science to everyone. For this (and the other ones in the series) to be a success, your help is needed. It needs to be seen. Tell your family and friends, colleagues and students, local teachers, etc., about it. Forward it on to people you know. Blog it, tweet it, facebook share it, etc. Crucially, remember that it is designed to be not just for people who already know they have an interest in science, but others too, so make no assumptions about who might like it… just please send it. Thanks.

Ok, let’s dim the lights! Run the Projector! (Tip: It is a high video quality, so pause it and let it buffer […] Click to continue reading this post →

LHC Update

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04collide_600Dennis Overbye wrote a nice summary article in the New York Times about the current status of the delays to the Large Hadron Colllider’s (LHC’s) re-opening. (Photo left by Valerio Mezzanotti for NYT) The issue is very frustrating, overall, even though one knows that delays like this can happen (and ought to be expected to happen) if you’ve built the largest and most complicated machine ever. I (and many colleagues) have in some sense waited for the LHC almost my entire professional career, and last Summer/Fall it seemed so close to finally starting to give us physics, only to have the failure happen, and set it all back. That’s life, of course. These things happen. I’ve a great deal of faith in the […] Click to continue reading this post →

Solstice Salad

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asparagus_potato_etc_salad_solstice

One of the offerings for my 17 guests during my solstice celebratory cooking session yesterday. (Click for larger view.) For background, see yesterday’s post.

I produced five or six core dishes for the menu, overall. Boy, that was fun! (There were also some excellent dishes brought by guests, and I had various other things […] Click to continue reading this post →

Summer Solstice!

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The Sun stood still earlier today! Don’t panic – It is Summer Solstice. I’m talking about an apparent motion of the sun, or, more accurately the migration of its path across the sky. Take a moment to think celestially for a bit and ponder the earth as it goes around the sun on its annual path. There’s a tilt to the earth’s own rotation axis, remember? (About 23 degrees). That tilt results in our seasons, and the path of the sun through the daily sky. Visualize this for a moment and it’ll make sense, if you let it. Today the sun’s path has got as northernmost as it will get, and it is now turning around, being more Southern each day until Winter Solstice. To turn around and change direction, you first have to stop. No way around it. So, the sun stood still today.

So, I decided to celebrate all this lovely geometry on the spur(ish) of the moment. Will you? I’m going to cook up several tasty dishes and have some friends around to […] Click to continue reading this post →

Go! Now! Get a Galileoscope!

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I just learned from Phil’s blog that the Galileoscopes I mentioned to you some months back (remember? International Year of Astronomy? Not just Darwin year?) are ready for shipping. There were issues with production at first, but now they are ready. The key issue right now seems to be that they are in danger of having to stop production of these lovely things if they don’t get lots of orders by May 31st. Ack!

So please please consider sending in a order for one or a few. Imagine what a delightfully unusual gift it would make for someone. Either someone you know, or someone you don’t know like a neighbour, your local school, church (yes!) or community center, or… even that special someone who you’d like to get to know – what an icebreaker, eh? Here’s a picture from the site of what a happy owner’ll have after assembling it:

galileoscope_kit_box

It is easy to put together, gives a new window onto the world above your head, and […] Click to continue reading this post →