Slashdot Mirror


Three Planets Racing this Weekend

William Robinson writes "This report asks you to keep your eyes on the skies this weekend, when a rare triple-planetary alignment is going to happen. It promises a stellar show for star-gazers. Scott Young of the Manitoba Museum Planetarium says the planets in question -- Mercury, Venus and Saturn -- are all big enough to be seen without a telescope."

35 of 164 comments (clear)

  1. That's no Moon! It's uh, um.. by Mulletproof · · Score: 5, Funny

    " And while star-gazers will be able to obscure all three planets simply by holding their outstretched thumb to the sky, Young reminds them appearances can be deceiving.

    "In reality, the planets are millions of kilometres apart," he said. "They only appear close in the sky because of our perspective. Saturn is actually over a billion kilometres behind Mercury."


    Oh thank God. I thought they were all going to crash into one another, showering the earth with deadily meteors or something. THANK YOU for thet reminder, Mr. Young.

    --
    You need a FREE iPod Nano
  2. Planet spotting by tolkienfan · · Score: 5, Interesting
    Mercury is actually quite hard to see because it's close to the sun - you can only catch it at certain times of the year and only ever close to dawn and dusk.

    Venus is similar - but less so.

    Saturn is often in the sky, and is a beautiful sight through a telescope.

    I can't wait to see them all so close together - Let's hope for clear skies!

  3. I'm going to buy a telescope! by CyricZ · · Score: 2, Interesting

    This event has convinced me to buy a telescope! I must see this first hand. What sort of telescope would be ideal for an amateur astronomer such as myself to view such a planetary event?

    --
    Cyric Zndovzny at your service.
    1. Re:I'm going to buy a telescope! by Renegade+Lisp · · Score: 2, Informative
      What sort of telescope would be ideal for an amateur astronomer such as myself to view such a planetary event?

      The event itself (meaning the triple-constellation) is probably best observed with the naked eye, or a simple pair of binoculars, because any decent telescope will have a smaller field of view than the area the three planets will be spread out over.

      Even with binoculars (when mounted to a tripod), you will be able to see a faint indication of Saturn's rings (indicated by the fact that it doesn't look like a symmetric blob, but just a little stretched along the horizontal axis. Galileo, when he first saw this with similar equipment, thought he was seeing three bodies right next to each other). You will also see some of Saturn's moons, and the current phase of Venus.

      Real astronomer's equipment can of course get you much much further.

    2. Re:I'm going to buy a telescope! by ZappaSoft · · Score: 2, Informative

      Dobsonian telescopes are very easy to use, beginner models are not very expensive and at the same time, you get the most bang for your buck, because the morror sizes on dobsonian telescopes tend to be a lot bigger than on refractors you would get at department stores for the same price. You can get a 4.5" Orion SkyQuest dobsonian telescope for $199 and really see a lot with it, tyr this url http://www.telescope.com/shopping/product/detailma in.jsp?itemID=364&itemType=PRODUCT&iMainCat=4&iSub Cat=9&iProductID=364. You might find these at a near by planetarium. If you are in a big city, even a very big telescope won't help you much because of all the light pollution. But on clear skies in the middle of nowhere, the 4.5" dobsonian will really let you see lot's of things. Tonight, you should be able to see all three planets really well with a 35mm or 45mm eyepiece. If you don't want to spend the money on a telescope, get some binoculars, but a telescope is a lot more fun once you get into it. Also, before you go, open up KStars, if you have Linux, that will help you with finding where things are at in the sky. Good luck!

    3. Re:I'm going to buy a telescope! by 1u3hr · · Score: 2, Informative
      Is there a site that says what time U.S time zone the alignment might appear on. What exact direction on a compass?

      There are lots of astronomical programs. One small, simple and free one is Starcalc. Just set it up with your latitude and longitude and it'll show you the sky at any time past present or future. Anyway, this shows that this is not a brief duration event like an eclipse but the three planets are very close over several days.

  4. Light pollution by sckeener · · Score: 2, Interesting

    Considering I live in Houston, I doubt I'll be seeing anything. Light pollution is atrocious. When I want to see the night sky, I have to go camping.

    --
    "Only one thing, is impossible for god: to find any sense in any copyright law on the planet." Mark Twain
  5. Planet Racing? ... by GreatRedShark · · Score: 4, Funny

    I want to know what odds the people in Vegas are giving to Mercury. I've got a lucky feeling about that planet!

    1. Re:Planet Racing? ... by AndroidCat · · Score: 2, Funny

      Careful. Last century Mercury was called for cheating. Luckily Einstein was able to get him off, but there's just something dodgy about that planet and god of thieves.

      --
      One line blog. I hear that they're called Twitters now.
  6. Disharmonious Noncordance by amstrad · · Score: 2, Informative

    Some people are idiots. Other people are not.

    1. Re:Disharmonious Noncordance by Adelbert · · Score: 2, Insightful

      I love how "Some people are idiots. Other people are not" gets modded "3, Informative".

      I have some others: some people are conservative, others are not. Some people eat meat, others do not. Some people read Slashdot, others have a social life.

      Come on mod points. I'm ready for you!

      Seriously though, if you haven't seen Bad Astronomy, do. Go to it. It rocks.

  7. Binoculars would be ideal by NotQuiteReal · · Score: 4, Informative
    If you are just starting, get some binoculars.

    Binoculars and a star chart.

    --
    This issue is a bit more complicated than you think.
    1. Re:Binoculars would be ideal by basilpronoun · · Score: 2, Informative

      Also, get the book 'Nightwatch: A Practical Guide to Viewing the Universe' by Terence Dickinson.

    2. Re:Binoculars would be ideal by joNDoty · · Score: 2, Informative

      If you are just starting, it might also help if somebody told you where to look:
      I'm new to stargazing but I downloaded Celestia (free) and flew over to the upper hemisphere of earth and set the date to tonight (June 25). You can find the planets by watching where the sun sets. The planets will set at that same spot about 2 hours later. They will be moving down and to the right at almost exactly a 45 degree angle to the horizon. So that means that after sundown, you can look up and left of that spot to find the planets. Look relatively low in the sky.

    3. Re:Binoculars would be ideal by res+ipsa+loquitur · · Score: 5, Informative

      " If you are just starting, get some binoculars."

      As someone who has used both binoculars & telescopes as an amateur, I would like to second this advice. Here are some specific reasons why:

      Movement. Telescopes all seem to have at least one direction reversed (in other words, to move the field to the right you need to move the telescope to the left. Or up/down is reversed.) This is not something that you get used to after 5 minutes - it's an ongoing frustration. And it's important because of:

      Field of vision. Telescopes tend to have a smaller field of vision, often something like 2 degrees (I'm going from memory here.) That may not sound bad, but in practice it can become a major hassle as you have to constantly move the telescope to keep things in your field of view. Also, you often want to view larger areas of the sky at one time without having to move your telescope. And given the movement problem (above), you will find yourself adjusting the telescope the wrong way about half of the time. Stupid? Yes. Frustrating? Double-yes.

      Ease of use. Telescopes require setup time. Binoculars require removal of the lens caps. This is one of those things that doesn't seem like a big deal in the store, but in real life it will quickly become a major issue (unless you leave you telescope planted in one place all of the time, which I don't think is an ideal situation for an amateur.) You want to be able to scan the sky with your bare eyes & then _immediately_ use your magnifying device to look at something specific. You do _not_ want to mess around with tripods and sighting scopes just to see the latest thing that caught your fancy. Binoculars win big here. Don't underestimate the usefulness of binoculars' quick reaction time. In my view, this is the most important factor to consider; if it isn't easy to use, you won't use it.

      For the record, I'm an amateur who has owned and used both inexpensive binoculars and an inexpensive telescope. I would _hands down_ recommend the binoculars. Get practical experience, and _then_ shop for a telescope.

      One more thing. Binoculars are much more kid-friendly than telescopes, so if you're a parent trying to interest your children in astronomy, add that to the above reasons.

      I hope this helps.

  8. Correction by QuickFox · · Score: 3, Funny

    It promises a stellar show for star-gazers.

    I'm afraid you've misunderstood this. It's not a stellar, it's planetary.

    --
    Terrorists can't threaten a country's freedom and democracy. Only lawmakers and voters can do that.
  9. Big or small moon? by LiquidCoooled · · Score: 3, Funny

    When aligned, the planets will fit into a piece of sky the same size as a full moon.

    Is that the low hanging moon or the smaller moon?

    --
    liqbase :: faster than paper
  10. US Race Fans Widely Dissapointed by Sv-Manowar · · Score: 5, Funny

    After a six car US F1 GP, only three planets racing this weekend?

    1. Re:US Race Fans Widely Dissapointed by haystor · · Score: 2, Funny

      If you step back just a bit you can get the earth into view also.

      --
      t
  11. An accurate story ... by busman · · Score: 2, Informative

    For some informative information on this "rare" event have a look
    at http://www.universetoday.com/am/publish/conjunctio n_mercury_venus_saturn.html?2362005/

    --
    __
    Sigs are like arse-holes, everybody has one ;-)
  12. Astronomers NOT Astrologers by Reverend528 · · Score: 2, Insightful
    From TFA: Young describes Mercury as an "elusive planet," noting most people, astrologers included, have never seen it.

    I don't see how this is so unusual, since it's an astrologer's job to look into the future, not to look into space (that would be an astronomer's job).

  13. Three planets are aligning? by chriswaclawik · · Score: 2, Informative
    Looks like it's time to cue "Also sprach Zarathustra," by Richard Strauss.

    (for the ill-informed, it's the music from 2001: A Space Odyssey that goes: duhhhh....duhhh....DUHHHHHH... [dun dun dun dun dun dun])

    --
    A guy walks into a bar... well, I forgot the joke, but the punchline is that he's an alcoholic.
  14. Re:Are there any simulations available for viewing by Junta · · Score: 4, Informative

    Not specifically for this event, but a really awesome simulator for astronomy stuff in general is celestia. http://www.shatters.net/celestia/

    Click on the earth, hit g (actually celestia starts you at earth), you can hit o to mark orbits to make it easier to find the planets (hit p to show labels to identify the planets themselves.)
    I hit shift-g to go to the surface of earth and then find the planets. Can give you a good idea where to look really. Being on the surface isn't particularly important at first, don't want the planet being between you and your destination until you are sure it wouldn't be.

    It doesn't always much like things really do, especially with atmospheric simulation not being particularly complex in celestia, but it is cool none the less. Particularly to click on one of the three planets close together, hit g, then look at everything from their perspective.

    --
    XML is like violence. If it doesn't solve the problem, use more.
  15. Re:Am I the only one wondering by tomlouie · · Score: 2, Informative

    From the article: "To catch the show, go outside after sunset today and find a spot with a clear view of the western horizon, Young said. As the sky darkens, Venus will be the first astral body to emerge, as it's the brightest object in the heavens after the sun and moon. Mercury and Saturn will show themselves soon afterward -- both being about as bright as the other, and shining with a pale, yellowish light."

    Tom

  16. Need a starchart? by lethalwp · · Score: 2, Informative

    Hello,

    If you need a good starchart to find stars/constellations/planets, i have one big recommendation for you, it's called skymap:
    http://skymap.com/products.htm

    you can use it in a demo version which is already very useful for a starter.

    Way to go! =)

  17. Horizons and light pollution by jfengel · · Score: 2, Interesting

    At least camping is an option. I live on the East Coast, and real darkness is many hours away. And even then the horizons are usually obscured by trees. But even I can see the conjunction.

    I'm sure the light pollution is pretty bad in Houston, but Saturn and Venus are easily visible even against that, and given those indicators it's not hard to find Mercury. You may have to go to the 'burbs rather than in the city proper, but I bet you could find it on top of a large building. The planets are pretty bright, and the problem in a city is more about horizon than light pollution.

  18. Astronomy over Astrology, Please by PingXao · · Score: 2, Informative

    I almost fell out of my chair when I RTFA. "Mercury is a planet few people, even astrologers, have ever seen." WTF? Is this Slashdot or the Nancy Reagan hotline? There's a better article at Sky and Telescope without any of the mumbo jumbo.

  19. Science for non-scientists by jfengel · · Score: 4, Insightful

    Thing is, the conjunction isn't really all that interesting, scientifically. It's interesting mostly because it's rare, and it's a way to get the vigorously nonscientific to actually watch the planets move across the sky. Go out on two successive nights and you can watch them move relative to each other.

    No biggie for your college-educated, Slashdot-reading brain, but a lot of people are bored stiff by science. Turn on Jeopardy some day and watch as the board clears of every category except Science. Not always, but too often.

    There's an awful lot of people who don't really get how the planetary orbits work, and probably DO think that they would collide. I bet you know at least some of them. Take them out and show them the conjunction. Take them out on successive nights and describe how we can figure out the heliocentric universe from the observations.

    1. Re:Science for non-scientists by TrappedByMyself · · Score: 5, Funny

      Take them out on successive nights and describe how we can figure out the heliocentric universe from the observations.

      "After our first date I couldn't get a hold of her. I even left a message telling her how I would teach her how to figure out the heliocentric universe from our observations. Hmmm, she must have left town for an emergency, but lost my number and couldn't call. Let me sit by the phone and wait."

      --

      Help me take back Slashdot. When did 'News for Nerds' become 'FUD and Conspiracy Theories for Extremist Nutjobs'?
    2. Re:Science for non-scientists by rxmd · · Score: 2, Insightful
      Take them out and show them the conjunction. Take them out on successive nights and describe how we can figure out the heliocentric universe from the observations.
      The funny thing is by the same "taking someone out and showing them", you can explain geocentric or sphere-based universes to them just as well, and they would believe it, too. And if anything remotely bad happened this weekend, they'd probably be gullible enough to believe it's because of the planets.
      --
      As a state gets corrupt, its laws multiply; the most corrupt states have the most numerous laws. (Tacitus, Annales 3:27)
  20. Imagine the orbits... by mister_llah · · Score: 2, Informative

    Well, assuming we are all in a straight line, 2D model... but not all orbits move on the same speed, and our only view of the heavenly sky isn't a direct path to the sun...

    So imagine looking up from earth, towards the sun, then to the sun's 11:15, let's say... we have a line up...

    They aren't all at the same "position" in their orbits, but they may line up...

    --
    MoM++ - A Classic Expanded - [Master of Magic 1.5]
    http://mompp.sourceforge.net/
  21. Re:Are there any simulations available for viewing by eclectro · · Score: 2, Informative

    To see what it looks like you could go to APOD, which is good for your little daily Astronomy fix/news.

    --
    Take the cheese to sickbay, the doctor should see it as soon as possible - B'Elanna Torres, "Learning Curve"
  22. My money is on Mercury... by gunner800 · · Score: 3, Funny

    It has the inside track.

  23. Re:Are there any simulations available for viewing by LiquidCoooled · · Score: 2, Funny

    I found some simulation images:

    Here is photo1: ...

    Here is the zoomed in annotated version:

    Mercury Venus
    \ /
    o o o
    \
    Saturn

    --
    liqbase :: faster than paper
  24. Re:k, am I the onlyone who notices... by close_wait · · Score: 2, Informative
    that Earth is BETWEEN Saturn and Venus, there fore the only planet's we'll see lined up are Mercury and Venus?

    No, Saturn is currently on the opposite side of the sun from us, so we are not between them.