October 18, 2017

12 Very Special Events for the Century.

“Bizarreness” is part of our business in astronomy. We always get the top billing with the “how big, how far, how bright” records, but one thing that is hard to quantify is just how unique certain events are. Here, I present you a quick list, a baker’s dozen of astronomical oddities that are worth setting your alarm clock for in the coming century in chronological order. A sort of Astroguyz to-do list for the coming century!

-January 15th 2010: The Longest Annular Eclipse Until 3043: Coming right up after the new year is what’s billed as the longest annular eclipse of the millennium. An annular eclipse occurs when the New Moon is near apogee and the Earth is near perigee, and hence the angular diameter of the Moon is too small to fully cover the Sun. This is a direct consequence of the longest totality of this past summer, in which the situation was reversed. “Annularity” lasts for a whopping 11 minutes and 8 seconds, and the entire event spans an area from the horn of Africa to China. This eclipse is part of saros series 141.

-October 8th, 2011: A possible Draconid Outburst?: The Leonids aren’t the only shower prone to storm level outbursts. The Draconids, also known as the Giacobinids, are a little known shower that peaks around Oct 8-10th of every year and generally is of little notice to all but the most avid meteor observers. It has been prone to outbursts, most notably in the years 1998, 1985, 1933, (33′ must have been a good year for meteors!) and 1946, when the ZHR peaked at 10,000! Another date worth noting is 2018, when the debris trail we’re predicted to pass through is very close to the 1946 storm trail. The Draconids hail from comet Giabobini-Zinner.

-June 6th, 2012: A Transit of Venus: The second transit of Venus for this century and pretty much the last one for anyone currently alive (unless they perfect that putting-our-brains-in-cyborgs thing) occurs on this date. This transit favors the Pacific rim, with North America getting a sunset transit and central Asia receiving a sunrise one. Most likely, the world won’t end on this date. The next transit won’t occur for another 105 years!

-July 14th 2015: The New Horizons Pluto Flyby: We include this as the sole mission oriented event because its the last semi-planet to be recon’d by mankind. Launched in 2006, New Horizons completed a gravitational swing-by assist of Jupiter in 2007 and is now the fastest object ever launched by mankind, and will whiz through the Pluto-Charon system on July 14th, 2015 at 14km per second. After this date, those blurry Hubble images of Pluto will be forever replaced by real pictures! What surprises await us in the denizens of the frigid outer solar system? More moons? A ring? An alien etched “Astroguyz” logo? And will the “is Pluto a Planet?” debate once again rear its ugly head?

-August 21st, 2017: A North American Eclipse: Total eclipses seem to avoid North America, Japan and Europe like the plague and hang out in places like Djibouti and Outer Mongolia. The dry spell ends in 2017, bringing an eclipse for the suburban masses. Do you live in or near Markanda, Illinois? Then you will have the distinct privilege to host two eclipses in the span of seven years, as another eclipse passes over on April 8th, 2024! expect the population of 419 to expand exponentially…(Howard Johnsons take note…)

-April 13th, 2029: The Flyby of Apophis: Will the world end on a Friday the 13th? The asteroid 99942 Apophis will indeed whiz by the Earth on such a date, within the realm of the geosynchronous satellites. Apophis carries with it the distinction of being the first, and so far the only asteroid to reach a “4” rating on the Torino scale for a short time back in 2004. Will it hit that tiny 600 meter key hole for an impact in 2036? Vegas odds are 1 in 45,000 against…viewing for the pass will favor Europe and Africa, where Apophis will appear as a swiftly moving star. Will we have the gumption by then to launch a manned mission to scope it out?

- November 19th, 2034 A Leonid Storm: I should be collecting social security just in time for this one…a meteor storm can be the event of a lifetime. The Leonids have always been a surefire bet; usually a lackluster shower of around ten meteors an hour, this stream is prone to well documented bursts in access of 1,000 ZHR every 33 years or so. The 1998 storm was still one of the coolest things I’ve ever seen! The years leading up to 2034…(i.e., 2030-2033) should merit your early AM attention around this date, as the peak “storm” may arrive a year early or late!

-September 8th 2040: A Tight Planetary Group: This evening in 2040 brings a very special view; all of the naked eye classical planets plus the waxing crescent Moon in a 9.3 degree grouping! This the tightest assemblage of these worlds visually this century!

-October 1st, 2044: An Occultation of Regulus by Venus! Naked eye occultations of planets by bright stars happen maybe a few times a century, and this is one of the best. If you find yourself in Eastern Asia or the western U.S., be sure to check this out!

-February 13th, 2056: The Moon occults Mercury & Mars at the same time. OK, now for the truly bizarre. Sure, you’ve seen the Moon occult planets and bright stars; this happens a few times a year from any given locale…but how often does the Moon occult two planets at the same time? This very event, it turns out, it rarer than a total solar eclipse during a Metallica concert… rare enough to only occur once or twice a millennium. This rarest-of-the-rare will occur over western North America in daytime afternoon skies. Venus and Jupiter will be close by.

-November 22nd 2065 Venus Occults Jupiter. Live in Panama? You just might catch a planet occulting a planet on this not so far off date. The apparent diameters of the two worlds will be 10” and 29”, respectively. The rest of the world will see a very close conjunction. For you history buffs, this is the first planet-planet occultation since 1818, also featuring Venus and Jupiter!

-August 11th, 2079: Mercury Occults Mars. This is rare, in that the worlds involved are tiny and thus generally miss each other in their apparent paths. This time the Middle East is favored to view this rare event; Mercury and Mars will be at a diameter of 5” arc seconds each and the rest of the world will again see an extremely close conjunction in the dawn skies…will we be cyber-Tweeting in our sleep by then?

-December 31st, 2099: The Aliens Invade & Become our Masters… OK, maybe they’ll be tired of the bad press they get in cheesy Sci-Fi movies and this will happen long before then…

So there you have it, twelve reasons to look up at the night sky throughout the 21st century. This list is by no means exhaustive; its just a quick pic of our faves. If your favorite, I’m-selling-my-house-and-moving-to-Panama-just-to-see-it event didn’t make the cut, drop us a line! For further astro-nerdiness, I invite you to peek at the outstanding Ultimate Almanac, as well as the wiki on planetary occultations. Its gonna be a wacky century…perhaps some budding 3-year old junior Carl Sagan out there just might live to be the first to collect them all!


  1. The “is Pluto a planet” debate has never gone away. Pluto is not a semi-planet; it is a planet. Please do not blindly accept the controversial IAU demotion which is still rejected by hundreds of professional astronomers. The images from New Horizons will illustrate definitively that Pluto, which is spherical (in hydrostatic equilibrium), has an atmosphere, has three moons, is geologically differentiated, and may even have weather, is very much a planet.

  2. webmaster says:

    Thanks for the input, Laurel; nothing seems to polarize astronomers like the definition of planetary status…for the record, we have spilled more cyber ink on this topic previously; http://astroguyz.com/2008/07/17/are-you-a-planet-a-humble-proposal/

    Dave Dickinson

  3. husky food says:

    [...] 12 Very Special Events for the Century. : Astro Guyz [...]


  1. [...] This post was mentioned on Twitter by Disaster Central. Disaster Central said: 12 Very Special Events for the Century. : AstroGuyz.com: and 1946, when the ZHR peaked at 10000! Another date w.. http://bit.ly/3JL7ki [...]

  2. [...] portion of the transit. This stands not only as the top astronomical event of 2012, but one of the great astronomical events of the 21st [...]

  3. [...] of the top-billed events for 2012 & this century occurred yesterday of June 5th, 2012 as Venus transited the Sun for the last time until 2117. The [...]

  4. [...] further occultation adventures await Venus in the 21st century. On October 1st, 2044 it will occult Regulus… and on November 22nd, 2065 it will actually occult [...]

  5. [...] rings of Saturn. Though no one alive today will live to see this event, we might just make it to November 22nd, 2065 to witness the transit of Venus across the face of Jupiter. Venus meets Jupiter on November [...]

  6. [...] Meeus compiled a list of close grand conjunctions from 3101 BC to 2735 BC. Hey, Stick around until September 8th, 2040 and you can witness a grouping of all five planets in the (plus the Moon!) in the dusk sky . Lets [...]

  7. [...] Meeus compiled a list of close grand conjunctions from 3101 BC to 2735 BC. Hey, Stick around until September 8th, 2040 and you can witness a grouping of all five planets in the (plus the Moon!) in the dusk sky . Lets [...]

  8. [...] Meeus compiled a list of close grand conjunctions from 3101 BC to 2735 BC. Hey, Stick around until September 8th, 2040 and you can witness a grouping of all five planets in the (plus the Moon!) in the dusk sky . Lets [...]

  9. [...] a list of close grand conjunctions from 3101 BC to 2735 BC. Hey, Stick around until September 8th, 2040 and you can witness a grouping of all five planets in the (plus the Moon!) in the dusk sky . Lets [...]

  10. [...] the Sun for the second and last time for this century on June 5th-6th, 2012, not to do so again until 2117. ‘There’s a little black spot on the Sun today…’ Mercury, at about the 9-10 [...]

  11. [...] – prima conjunctie vizibila din secolul 21 a Lunii (in faza de semiluna) impreuna cu 5 planete (Mercur, Venus, Marte, Jupiter, Saturn). Va fi vizibila la Est fata de Soare la ora 19:30. Un [...]

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