- Our Solar System and the Pluto Problem #
From lecture 3 in professor Charles Bailyn’s ASTR 160: Frontiers and Controversies in Astrophysics:
Bailyn first reminds us of the scientific method and that astronomy is an observational science. He then talks about classification and the six categories of objects in the Solar System:
- Sun (a star).
- Inner, sometimes called terrestial or rocky, planets.
- Outer, also known as Jovian, planets.
- Trans-Neptunian, or Kuiper Belt, objects.
- Comets in the outer region, or Oort cloud.
So, here are the six categories that I would claim exist in the Solar System. And here’s my problem with the whole Pluto debate. The Pluto debate was basically about whether these guys are going to count as planets. But the thing is, “planets” is already a bad description, because it contains two quite different categories; namely, these inner terrestrial planets, and the outer Jovian planets. So, it seems to me that arguing whether category five should be part of some category that already contains two fundamentally different kinds of objects is kind of a strange argument to be having. Either we should split these two things off from each other, or, if we’re going to join these two kinds of the categories, fine, bring in anything you like. I don’t care, add the asteroids, too. And, in fact, in the original proposal, one of the asteroids qualified as well. And so, it doesn’t seem to me that this controversy was really paying justice to an appropriate classification of the things in the Solar System.
Sunday, 25 January 2015
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The Digital Universe, developed by the American Museum of Natural History’s Hayden Planetarium, incorporates data from dozens of organizations worldwide to create the most complete and accurate 3-D atlas of the Universe from the local solar neighborhood out to the edge of the observable Universe.
Since 1998, the American Museum of Natural History and the Hayden Planetarium have engaged in the three-dimensional mapping of the Universe. This cosmic cartography brings a new perspective to our place in the Universe and redefines our sense of home.
Happily a version of the PartiView software and data sets used in the planetarium is available for download to fly around the known universe in your own computer. I will use this as a scouting tool for my next destinations in Elite!
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Sunday, 18 January 2015
- 2015: International Year of Light #
On 20 December 2013, The United Nations (UN) General Assembly 68th Session proclaimed 2015 as the International Year of Light and Light-based Technologies (IYL 2015).
This International Year has been the initiative of a large consortium of scientific bodies together with UNESCO, and will bring together many different stakeholders including scientific societies and unions, educational institutions, technology platforms, non-profit organizations and private sector partners.
In proclaiming an International Year focusing on the topic of light science and its applications, the United Nations has recognized the importance of raising global awareness about how light-based technologies promote sustainable development and provide solutions to global challenges in energy, education, agriculture and health. Light plays a vital role in our daily lives and is an imperative cross-cutting discipline of science in the 21st century. It has revolutionized medicine, opened up international communication via the Internet, and continues to be central to linking cultural, economic and political aspects of the global society.
- Columbia Astronomy Public Outreach #
Free lectures followed by guided stargazing with telescopes (weather permitting) at Columbia University.
- Comedy Subverts the World of Hollow Power #
It is our job to recognise the absurd, and to ridicule what is already absurd.
Subversion is subliminal, a state of mind, and for this reason the suppression of free speech is an expression of the way in which people are ground down economically, and the repression of humour is part of that economic repression.
There are people attacking us who have never seen it, or think it’s only concerned with Islam. The fact is they don’t know how to read cartoons. There are people who, even if they are illiterate, know how to view a cartoon. And there are clever people with an agenda who just don’t have the culture to understand our laughter. And among the second group are these people like your prime minister and all the others calling themselves Charlie. It’s completely ridiculous, first because in the end they don’t want us, and they don’t want to be Charlie – how could they be? They hate us! And second because they are pretentious, and all pretention is false. When the king employed a fool to laugh at him, the fool was the only one allowed. Now they want no one to laugh at them, but we are free and we do. And if you abolish humour, or kill the funny people, there is nothing left – nothing.
People say we should respect religion, but our attitude to religion is the same as it is to any other ideology.
Wednesday, 14 January 2015
- Every Few Years People Remember Websites Should Be Simple and Simplicity is Hard #
- Visibility of system status: The system should always keep users informed about what is going on, through appropriate feedback within reasonable time.
- Match between system and the real world: The system should speak the users’ language, with words, phrases and concepts familiar to the user, rather than system-oriented terms. Follow real-world conventions, making information appear in a natural and logical order.
- User control and freedom: Users often choose system functions by mistake and will need a clearly marked “emergency exit” to leave the unwanted state without having to go through an extended dialogue. Support undo and redo.
- Consistency and standards: Users should not have to wonder whether different words, situations, or actions mean the same thing. Follow platform conventions.
- Error prevention: Even better than good error messages is a careful design which prevents a problem from occurring in the first place. Either eliminate error-prone conditions or check for them and present users with a confirmation option before they commit to the action.
- Recognition rather than recall: Minimize the user’s memory load by making objects, actions, and options visible. The user should not have to remember information from one part of the dialogue to another. Instructions for use of the system should be visible or easily retrievable whenever appropriate.
- Flexibility and efficiency of use: Accelerators — unseen by the novice user — may often speed up the interaction for the expert user such that the system can cater to both inexperienced and experienced users. Allow users to tailor frequent actions.
- Aesthetic and minimalist design: Dialogues should not contain information which is irrelevant or rarely needed. Every extra unit of information in a dialogue competes with the relevant units of information and diminishes their relative visibility.
- Help users recognize, diagnose, and recover from errors: Error messages should be expressed in plain language (no codes), precisely indicate the problem, and constructively suggest a solution.
- Help and documentation: Even though it is better if the system can be used without documentation, it may be necessary to provide help and documentation. Any such information should be easy to search, focused on the user’s task, list concrete steps to be carried out, and not be too large.
I remember reading that Nielsen consulted with Google for a day when they were starting out, and his recommendations helped define the simplicity of the site in the beginning: the logo, a search bar and a few footer links. ↩
Sunday, 11 January 2015
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- OS X Yosemite to run everything (fix, please).
- Firefox with Ad Block Plus and HTTPS Everywhere plugins to browse and develop.
- Gmail to email.
- Lightroom to edit and develop photographs.
- Textmate to write and code.
- Terminal to deploy and tinker.
- nvAlt to note down.
- f.lux to keep eyes healthy and brain sane.
- Git to cooperate, coordinate, deploy, roll back and backup.
- rsync to deploy, coordinate and backup.
- wget to download.
- Python, Ruby and PHP to hack together.
- Homebrew to setup.
- Django, Jekyll and Wordpress to publish.
- PostgreSQL and MySQL to work with lots of data.
- Chrome to watch videos that still require Adobe Flash.
- Transmit to browse files remotely.
- InDesign to typeset, layout and draw in vectors.
- Photoshop to draw and edit.
- Spectacle to keep the windows organized.
- Pages to read and edit word files.
- Numbers to read and edit excel files.
- Calendar to keep track.
- Facetime to talk to people remotely.
- Preview to read and annotate (one of the reasons I use Macs is that PDF is the operating system’s native display format).
- Camera and Whatsapp to record and send messages.
- Elite: Dangerous to learn and play and wander (currently on a partition with Windows 7 until the Mac version comes out in a few months).
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Thursday, 04 December 2014
- Write the Docs #
Write the Docs is a place where the art and science of documentation can be practiced and appreciated. There are a lot of people out there who write docs, but there isn’t a good place to go to find information, ask questions, and generally be a member of a community of documenters.
Friday, 21 November 2014
- Man's Ideas Upon Divinity #
If a faithful account was rendered of Man’s ideas upon Divinity, he would be obliged to acknowledge, that for the most part the word “gods” has been used to express the concealed, remote, unknown causes of the effects he witnessed; that he applies this term when the spring of the natural, the source of known causes, ceases to be visible: as soon as he loses the thread of these causes, or as soon as his mind can no longer follow the chain, he solves the difficulty, terminates his research, by ascribing it to his gods… When, therefore, he ascribes to his gods the production of some phenomenon… does he, in fact, do any thing more than substitute for the darkness of his own mind, a sound to which he has been accustomed to listen with reverential awe?
— Paul Heinrich Dietrich, Baron von Holbach, Système de la Nature, London, 1770
Wednesday, 12 November 2014
- Great Day for Humankind #
After a ten year flight, a machine we made has landed on a comet! What wonderful photographs by the orbiter and the lander parting ways! I’m opening a bottle of champagne tonight with love for the Cosmos, then venturing out in Elite: Dangerous!
Tuesday, 11 November 2014
Saturday, 08 November 2014
- Django Tip: Getting Information Into Your Template’s Context #
Great tip from Reinout van Rees.
Wednesday, 05 November 2014
- Golgafrincham Ark Fleet, Ship B #
The B Ark is technically named “Golgafrincham Ark Fleet, Ship B”. The Golgafrincham civilization hatched a plan to eliminate its society of its most useless workers, namely its service sector and its paper shufflers. The Golgafrinchans created a legend that their world was about to be destroyed and they needed to build three arks. In Ark A they would put all the high achievers, the scientists, thinkers, artists, and important leaders. In Ark C they would put all the blue-collar workers, the people that build and make things. In Ark B they would put everyone else: hairdressers, TV producers, insurance salesmen, personnel officers, security guards, public relations executives, and management consultants.
The B Ark was constructed, loaded up, and launched first. However, it was automatically set for a collision course with Earth’s sun, to finally rid Golgafrincham of these twits. And naturally, no A or C ark was ever made.
Friday, 31 October 2014
- Tim Cook Speaks Up #
Part of social progress is understanding that a person is not defined only by one’s sexuality, race, or gender.
Friday, 17 October 2014
- Why Wings Work #
But, even as a child, I found that it presented me with a puzzle: how can a plane fly inverted (upside down). When I pressed my 6th grade science teacher on this question, he just got mad, denied that planes could fly inverted and tried to continue his lecture. I was very frustrated and argued until he said, “Shut up, Raskin!” I will relate what happened next later in this essay.
I wish I could send this essay to the 6th grade science teacher who could not take the time to listen to my reasoning. Here’s what happened: he sent me to the principal’s office when I came in the next day with a balsa model plane with dead flat wings. It would fly with either side up depending on how an aluminum foil elevator adjustment was set. I used it to demonstrate that the explanation the class had been given must have been wrong, somehow. The principal, however, was informed that my offense was “flying paper airplanes in class” as though done with disruptive intent. After being warned that I was to improve my behavior, I went to my beloved math teacher who suggested that I go to the library to find out how airplanes fly—only to discover that all the books agreed with my science teacher! It was a shock to realize that my teacher and even the library books could be wrong. And it was a revelation that I could trust my own thinking in the face of such concerted opposition. My playing with model airplanes had led me to take a major step toward intellectual independence—and a spirit of innovation that later led me to create the Macintosh computer project (and other, less-well-known inventions) as an adult.
Tuesday, 14 October 2014
- The Edge of Forever #
If the cosmos is closed, there’s a strange, haunting, evocative possibility. One of the most exquisite conjectures in science or religion. It’s entirely undemonstrated, it may never be proved, but it’s stirring. Our entire universe, to the farthest galaxy, we are told, is no more than a closed electron, in a far grander universe we can never see. And that universe is only an elementary particle in another still greater universe, and so on, forever. Also, every electron in our universe, it is claimed, is an entire miniature cosmos containing galaxies and stars and life, and electrons. Everyone of those electrons contains a still smaller universe, an infinite regression up and down.
Every human generation has asked about the origin and fate of the cosmos. Ours is the first generation with a real chance of finding some of the answers. One way or another, we are poised at the edge of forever.
Wednesday, 08 October 2014
- Nature is Speaking #
Nature doesn’t need people. People need nature.
Human beings are part of nature. Nature is not dependent on human beings to exist.
Human beings, on the other hand, are totally dependent on nature to exist.
The growing number of people on the planet and how we live here is going to determine the future of nature. And the future of us.
Nature will go on, no matter what. It will evolve.
The question is, will it be with us or without us?
If nature could talk, it would probably say it doesn’t much matter either way.
We must understand there are aspects of how our planet evolves that are totally out of our control.
But there are things that we can manage, control and do responsibly that will allow us and the planet to evolve together.
We are Conservation International and we need your help. Our movement is dedicated to managing those things we can control. Better.
Country by country.
Business by business.
Human by human.
We are not about us vs. them.
It doesn’t matter if you’re an American, a Canadian or a Papua New Guinean. You don’t even have to be particularly fond of the ocean or have a soft spot for elephants.
This is simply about all of us coming together to do what needs to be done.
Because if we don’t, nature will continue to evolve. Without us.
Tuesday, 07 October 2014
- Encrypting Phones Makes The World A Safer and Better Place #
Sunday, 05 October 2014
- Isis #
By Bob Dylan.
I married Isis on the fifth day of May But I could not hold on to her very long So I cut off my hair and I rode straight away For the wild unknown country where I could not go wrong.
I came to a high place of darkness and light The dividing line ran through the center of town I hitched up my pony to a post on the right Went in to a laundry to wash my clothes down.
A man in the corner approached me for a match I knew right away he was not ordinary He said “Are you looking for something easy to catch ?” I said “I got no money”. He said “That ain’t necessary”.
We set out that night for the cold in the North I gave him my blanket he gave me his word I said “Where are we going ?” He said “We’d be back by the fourth” I said “That’s the best new that I’ve ever heard”.
I was thinking about turquoise I was thinking about gold I was thinking about diamonds and the world’s biggest necklace As we rode through the canyons through the devilish cold I was thinking about Isis how she thought I was so reckless.
How she told me that one day we meet up again And things would be different the next time we wed If I only could hang on and just be her friend I still can’t remember all the best things she said.
We came to the pyramids all embedded in ice He said “There’s a body I’m trying to find If I carry it out it’ll bring a good prize” It was then that I knew what he had on his mind.
The wind it was howling and the snow was outrageous We chopped through the night and we chopped through the dawn When he died I was hoping that it wasn’t contagious But I made up my mind that I had to go on.
I broke into the tomb but the casket was empty There was no jewels no nothing I felt I’d been had When I saw that my partner was just being friendly When I took up his offer I must-a been mad.
I picked up his body and I dragged him inside Threw him down in the hole and I put back the cover I said a quick prayer and I felt satisfied Then I rode back to find Isis just to tell her I love her.
She was there in the meadow where the creek used to rise Blinded by sleep and in need of a bed I came in from the East with the sun in my eyes I cursed her one time then I rode on ahead.
She said “Where ya been ?” I said “No place special ?” She said “You look different” I said “Well I guess” She said “You been gone” I said “That’s only natural” She said “You gonna stay ?” I said “If you want me to, Yeah ”.
Isis oh Isis you mystical child What drives me to you is what drives me insane I still can remember the way that you smiled On the fifth day of May in the drizzling rain.
Monday, 29 September 2014
- The Importance of The Indie Web #
We’re in danger of losing what’s made the Internet the most important medium in history – a decentralized platform where the people at the edges of the networks – that would be you and me – don’t need permission to communicate, create and innovate.
This isn’t a knock on social networks’ legitimacy, or their considerable utility. But when we use centralized services like social media sites, however helpful and convenient they may be, we are handing over ultimate control to third parties that profit from our work, material that exists on their sites only as long as they allow.
Even if most people don’t recognize what’s at stake – yet – I’m happy to say that a small but growing group of technologists does. And they’ve created what they call the “Indie Web” movement to do something about it, in an extended online conversation and at periodic in-person meetings.
Friday, 26 September 2014
- Leonardo DiCaprio Addresses UN Regarding Climate Change #
A celebrity doing important work.
Monday, 22 September 2014
- Roman Vishniac: Humanist, Photographer #
Living with the memory of hardship, Vishniac was, “an absolute optimist filled with tragedy. His humanism is not just for Jews, but for every living thing.” He probably believed in God or some similar concept, but he was non-denominational and did not adhere strictly to the principles of any religion. He even clashed with Orthodox Jews in one well-known instance: The religious Jews he met on his trek around Europe would not let themselves be photographed, quoting the Bible and its prohibition of making of graven images. Vishniac’s famous response was, “the Torah existed for thousands of years before the camera had been invented.”
Vishniac was known for having great respect for all living creatures. Whenever possible, he returned a specimen to its precise home before it was captured and one time “[lent] his bathtub to tadpoles for weeks until he could return them to their pond”. In accordance with this philosophy, he photographed almost exclusively living subjects.
Saturday, 20 September 2014
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Looking into a side of the Milky Way from the Asellus system in Elite: Dangerous. The glowing red star is Asellus Primus B, 0.16 light years away.
Thunder ends the hyperspace jump and we are now in a different here in a different now with glowing orb of fire filling our view. Hazard proximity sensors are going off and we maneuver away toward points of light in the darkness of space — some very bright, others invisible if not for the navigation overlays which indicate the orbits and positions of celestial bodies in this system. We are in Super Cruise mode, a sort of crawling speed setting in the space travel throttle and the ideal way to fly around the local solar system with red and blue-shifting star and dust trails all around.
As we gather speed away from the ball of plasma the blackness of space begins to fade away, gradually revealing the number of other stars there and then. The heavens begin to change colour, blues and violets of interstellar clouds of dust, nebulae illuminating the glinting night, a long section of which is bright as an Earth day. The middle of this bright river of light is the center of our own Milky Way galaxy, another point of which we have reached.
Second burst of thunder and we are now out of Super Cruise in local time where Newton’s maths of motion rule our ballet. Thrusters up, throttle forward, flight assist off, push stick forward slowly, then release. The distant jewels now spin slowly around us in the infinity of the universe. Black sphere with half-circle sliver of light perpendicular to thin illuminated ring of giant dust rises from the horizon of our lower dashboard, followed by a crescent moon, and then a cuboctahedron — a Coriolis station.
Approaching, we feel the size of the station. As towers and other appendages of this spinning city in space fly by our ship we hear the moan of a massive structure. As in film, sound and music help form the whole of our flying experience. Staccato popping-and-buzzing of directional thrusters, twanging sounds of a 1970’s cross-between-VW-bus-and-space-shuttle Hauler ship engine, heaving heavy machinery opening cargo bay or landing gear doors; utter silence followed by crunching of ice crystals forming around cockpit glass panes when switching off systems to reduce heat signature and disappear from sensors. Elite’s orchestra puts us here inside a ship flying in space, our hands and feet on the controls, cockpit’s metal frames moving with inertia casting dancing shadows in pools of colored light from stars, planets, stations, our own and other ships, their engines glinting, tracing a disappearing line in the immensity of the cosmos.
We align ourselves with the the entrance and match the Coriolis’ rotation. Now the stars are moving and we, along with the station, are still.
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