Ponder The Known Universe


In 2009 the American Museum of Natural History (AMNH) debuted The Known Universe for an exhibit at Rubin Museum of Art in New York City. AMNH and Hayden Planetarium astrophysicists resourced Digital Universe Atlas to produce five and a half minutes capable of unfurling the sternest brow. Our world would be a better place if everyone stopped talking long enough to ponder a space video before bed.

http://www.amnh.org/our-research/hayden-planetarium/digital-universe/

Ready To Harmonize Time?


This re-post springs forward from pondering time. At 2 AM my clock screamed 3 AM and I found myself calculating implications of time zone variances for friends and family. Happy Daylight Savings Day 🙂

notestoponder

Named after Pope Gregory XIII, the Gregorian calendar was introduced in 1582 – six years after the death of Luigi Lillio, Italian doctor, astronomer and philosopher credited with conceptualizing replacement of the Julian calendar. Julian, a hail to Julius Caesar, dominated the known world from 45 BC until the Gregorian revolution in 1582.

On average, Earth takes 365 days, 5 hours, 48 minutes and 45 seconds to complete one orbit around the Sun. Julian and Gregorian years are 365 days divided by 12 months. What to do with leftover hours, minutes and seconds – both embraced the leap year solution, vastly different implementation exposed Julian’s greatest flaw. Julian added an extra day to February every 4 years, a system resulting in a mathematical gain of one day every 128 years. That’s 3 days every 400 years, 28 days by the time Gregorian reform took hold in 1582 – close to…

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Help Find Planet 9


In January 2016 Caltech astronomers publicly theorized existence of a behemoth ninth planet orbiting the Sun.  Observations of orbital anomalies in the Kuiper Belt (a massive ring of cosmic debris extending beyond Neptune – home to once a planet Pluto and estimated 100,000 neighbors measuring over 100 Km ) hypothesized a yet to be discovered gargantuan mass was responsible for peculiar behavior of Kuiper Belt residents. In theory a planetary mass ten times greater than Earth, completes an elongated orbit a thousand times farther from the Sun once every 15-20 thousand years – astronomers dubbed it Planet 9.

This diagram show the orbits of several Kuiper Belt objects that were used to infer the existence of Planet 9. Image via ASU.

Contrary to conspiracy, alien, biblical and doomsday jibber-jabber, no proof of Planet 9 exists – science has a theory based on seven years of  sky maps courtesy the WISE space telescope (see link below). Launched in 2009, WISE was designed to detect low level infrared light, light emissions consistent with planets. WISE buckled down – over 750 million curious infrared light sources later, science needs our help.

http://www.jpl.nasa.gov/wise/

If Planet 9 is out there, chances are WISE has digital proof somewhere within those 750 million and counting infrared hits. Missing are enough eyes to systematically scan images for indications an object moves “apart” from surrounding cosmic pixels. Enter Zooniverse Backyard Worlds –

“We need your help searching for new objects at the edges of our solar system. In this project, we’ll ask you to help us distinguish real celestial objects from image artifacts in data from NASA’s Wide-field Infrared Survey Explorer (WISE) mission. The real objects are brown dwarfs and low-mass stars, the Sun’s nearest neighbors. You may find an object closer than Proxima Centauri (the closest star to the Sun) or even discover the Sun’s hypothesized ninth planet, which models suggest might appear in these images.

What are the Sun’s nearest neighbors? You may have heard of Proxima Centauri, the star nearest the sun. But most of the Sun’s nearest neighbors are not stars, but brown dwarfs, balls of gas too big to be called planets but too small to be called stars. We’ve learned by extrapolating from recent discoveries that there is likely a hidden population of brown dwarfs floating by the solar system. This population contains the coldest known brown dwarfs, known as “Y dwarfs,” which are very similar to planets that just don’t orbit other stars. Together, we will try to find these rogue worlds to better understand how both stars and planets form.”

Backyard Worlds needs fresh eyes and plenty of them. Science doesn’t care who you are, what you do or if Kuiper Belt sounds like a foreign language – science needs help. Participants whose efforts lead to discovery will be given full credit. What are you waiting for? Join the search for Planet 9.

A previously cataloged brown dwarf named WISE 0855-0714 shows up as a moving orange dot (upper left) in this loop of WISE images spanning 5 years. By viewing movies like this, anyone can help discover more brown dwarfs or even a 9th planet. Image via ASU/ NASA/WISE.

http://earthsky.org/space/help-astronomers-look-for-planet-9?mc_cid=146840be1a&mc_eid=a5b828713b

https://www.zooniverse.org/projects/marckuchner/backyard-worlds-planet-9