Category Archives: astronomy

Distractions in the Dark

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Well, you’ve probably guessed that I’ve been somewhat distracted for several days. In fact, my main focus for the past week has really been on computer issues, frustratingly. I’ll give you the blow by blow later, I hope, but the last couple of days have been the most frustrating of all, and so I’ve not been dealing with much else, including blogging. Part of that is actual logistics – some of the things I wanted to post are on the afflicted computer – and some just the sheer annoyance of not having solved the issues driving me to do something totally non-computer related like going for a hike or seeing a movie.

So tonight i think I have a new theory – well, hypothesis- of what’s wrong, after a good deal of the day spent on detective work. It is a conjecture that is supported only by […] Click to continue reading this post →

Bowled Over

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One of the Phoenix images that has most captivated has been the one that shows the rest of the background of that startling image of the parachute part of the landing phase that was taken by the Reconnaissance orbiter’s HiRiSE camera. I showed it a few days ago here, and it is amazing, for all the reasons I said back then and more. I’m still buzzed by the idea that we have cameras from another craft photographing the landing of a new craft. Well, a while later, the mission released the photo showing the larger backdrop to that image. There’s the (giant 10 km) Heimdall crater in the background! (See the little inset bottom left showing where the previous image focussed; credit: NASA/JPL).

Phoenix landing on Mars with Heimdall crater in background

Rather dramatic, wouldn’t you agree? It’s not really as close to the crater as it […] Click to continue reading this post →

Photo Finish

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Marvellous. It is good to get the chance to use the word in its most basic sense, and fully mean it. You know how there’s a lot of reliance on artist’s impressions to depict aspects of space missions (such as landing) that we can’t get photos of because, well, there’s nothing else there to take the photo (unlike the movies and TV)? Well look at this:

Phoenix lander in the act of landing, using its parachute to slow down during the \"seven minutes of terror\". Photo by High Resolution Imaging Science Experiment (HiRISE) camera on NASA\'s Mars Reconnaissance Orbiter
It may not look like much to some, but I’m really impressed with this. It is a first. It is the Phoenix lander during the act of landing during the “Seven Minutes of Terror” yesterday! NASA’s Mars Reconnaissance Orbiter was in the right position to take a […] Click to continue reading this post →

She Stuck The Landing!!!

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16:56 or so: Yep. That was a tense seven minutes. But it is over and they are getting signals. I watched the live feed from the JPL control room. Wow. Who knew this could be so exciting from so far away?! Anybody else watch it?

  phoenix_control_room_celebrations   phoenix_control_room_celebrations  phoenix_control_room_celebrations

-cvj

P.S. Yes, with my choice of title, I’m clearly practicing for the commentary on the Olympic gymnastics… Click to continue reading this post →

Seven Minutes of Terror

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Phoenix Lander making a soft landing on Mars - depiction by JPL artist Corby Waste

The phoenix lander making (we all hope) a soft landing on Mars – Artist’s depiction by JPL Mars program artist Corby Waste

Remember the launch of the Phoenix spacecraft last summer? I mentioned it in earlier posts (including talking about the mural for it – see here and here) and Phil did a lovely post on the launch here. Have a look at the mission website. Here is a space.com article that gives an update on the mission so far.

Well, today’s the day it approaches and (it is hoped) lands on Mars!! So, the landing. The landing, the landing the landing. It’s all about the landing. The craft has to slow down from 12500 miles per hour to make a soft landing on the surface. In a matter of […] Click to continue reading this post →

Catch a Falling Star

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Ok… A dying star. Here’s the before and after shot (images from the NASA Swift team):

supernovae 2007uy and 2008d

An the amazing thing is that they were able to watch and record the events in real time! The galaxy hosting the explosion was already under study because of an earlier supernova. This is wonderful, of course, and a big deal is made in various news articles about how great it is that this is the first time that a supernovae event was caught in real time from an earlier hint from an X-ray emission signature… Except that it seems that it isn’t!!! I do find it a tad annoying/puzzling that in a few seconds I was able to find pretty much the same sort of news announcement from two years ago. Does the press think that the members of general public are stupid, or have no memory? (I don’t yet have time to re-read both articles carefully, so I imagine this is maybe much better (it is rather closer), and there were more telescopes recording, and maybe from earlier, in a wider spectrum, and so forth, but not to mention the earlier event at all, as though a big news story was not made of it back then, is strange. (Perhaps the finding was discredited?) I did a blog post mentioning it entitled “When Stars Go Bang”, and you can link from there to a BBC news article for example of the coverage.)

Anyway, back to the excitement. We must not take away from the joy of discovery: From […] Click to continue reading this post →

Mountain Astronomy Party!

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Mount Wilson 60 inch telescopeI was at an unusual and splendid event on Saturday. My friend and colleague, the writer Aimee Bender, organized a group of 25 of us to go to the top of Mount Wilson and spend the evening, mostly sitting in the dark, right up to well after midnight! What were we doing? Astronomy. We had the Mount Wilson Observatory’s 60 inch telescope entirely at our disposal!! This is not any old 60 inch telescope – it is one of the historic telescopes that’s up there, used since the early part of the 20th Century to discover things about our galaxy and beyond. (See also a post I did about the 100 inch, and the hike you can do up the mountain to see the site. [Update: Note – For this trip, we drove up, carpooling!])

Shelley giving information during the Mount Wilson observing sessionAimee had reserved the space well in advance, and we had a guide and a telescope operator (the excellent Shelley Bonus and Arbi Karapetian, respectively), and we brought food, which was spread out on a large table alongside vats of coffee and hot water supplied by the observatory.

This is an excellent way to spend an evening. Shelley is informative and enthusiastic, and does a great job of selecting various objects to be viewed (she also takes requests!) and giving lots of information and anecdotes about them, and much else besides. Arbi was also a gold mine of information.

The party was of 24 non-scientists (there were a lot of writers of various types, for example – poets, screenwriters, novellists, experts in poetry and literature and language…) and one physicist. As the latter, I tried to remain undercover, so as not to […] Click to continue reading this post →

Good Company

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Brian May. Photo from: http://www.guitar-poll.com/BM.phpHey, guess who was at Griffith Observatory recently? Brian May! He’s that astrophysicist who took some time off to play (excellent) guitar and compose songs in the band called Queen. Ring any bells? (I found the nice photo here.) So why was he in town? Well, a slightly giggly (but always great) Madeline Brand (of the NPR program “Day To Day”) went along to interview him, and you can listen to the interview here, and read a transcript, as well as see extracts from him book (written with Patrick Moore and Chris Lintott), charmingly and blatantly (but knowingly?) unrealistically called “Bang! The Complete History of the Universe”. I actually looked through it in a bookstore the other day – looks rather nice. Wonderfully produced and I read some well-written passages, so might be worth picking up if you’re looking for a fresh read about the universe.

As a side note, I was a huge fan of his during my middle to late teenage years and early 20s, and […] Click to continue reading this post →

JPL Open House!

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Oh! It is the open house for the Jet Propulsion Laboratory this weekend! I almost missed it since it was two weekends later last year. Image composite brazenly taken from their website.

JPL Open House

I went last year and had a great time and so I strongly recommend it. Go along for your own interest, of course, but if you have any kids, take ’em along*. If interested, have a look at my detailed post from last year entitled “JPL the new Disneyland?”

As I said there: […] Click to continue reading this post →

Categorically Not! – Loops

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The next Categorically Not! is on Sunday April 27th (upcoming). The Categorically Not! series of events that are held at the Santa Monica Art Studios, (with occasional exceptions). It’s a series – started and run by science writer K. C. Cole – of fun and informative conversations deliberately ignoring the traditional boundaries between art, science, humanities, and other subjects. I strongly encourage you to come to them if you’re in the area. Here is the website that describes past ones, and upcoming ones. See also the links at the end of the post for some announcements and descriptions (and even video) of previous events.

The theme this month is Loops Here’s the description from K C Cole:

“When you come right down to it, just about everything is loopy: planets, proteins or life stories, things have a way of coming around again, always with a slightly different spin. This month’s Categorically Not! was conceived as a tribute to Douglas Hofstadter’s new book, I am a Strange Loop, which uses […] Click to continue reading this post →

All Creatures Great and Small

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The previous post was a farewell to black holes in the class, not here on the blog. (And it was not quite a farewell there either, since the midterm yesterday was all about the properties of the Reissner-Nordstrom black hole, representing a black hole with an electric charge, and a nice computation involving cosmic censorship.)

There have been two rather notable discoveries in the black hole astrophysics world this week. The first is the discovery of what seems to be another case of an intermediate mass black hole (there was only one example known before). Not the supermassive ones that live at the centers of galaxies (tens to hundreds of millions of times the mass of our sun), and not stellar mass ones of a few times the mass of our […] Click to continue reading this post →

Biggest Binoculars Ever

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Large Binocular Telescope (image courtesy of the LBT)

Am I the only one who sees this, or does this look like the head of some giant friendly robot, all smiles with big cheeks? Remember Brad Bird’s Iron Giant, for example?

Well, it is actually not from science fiction but science fact. And it is a robot, sort of – well it can be controlled remotely to swivel its head and so forth. It is actually a […] Click to continue reading this post →

Tipping the Light Cone: Black Holes

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Black Holes by Tamsin Van Essen: http://www.vanessendesign.com/

Black Holes, by Tamsin Van Essen. Part of a series of lovely ceramics with a physics theme. For more, visit the websites here and here.

As you may recall from the post I did some time ago, the “Light Cone” is a rather important concept in physics, and keeping track of it in a given physical scenario is an extremely important tool and technique for understanding many physical situations. (I urge you to review that post before continuing reading this one.)

One way to understand a most important concept – the event horizon – is by keeping track of lightcones, and so let’s go ahead and explore that here. The outcome is that […] Click to continue reading this post →