Ponder Solar Timelapse


SDO, NASA’s Solar Dynamics Observatory left for work on February 11, 2010. Seven years later and counting, SDO faithfully watches the Sun in different wavelengths. Different wavelengths reveal temperature variances in vivid colour, mesmerizing real time images unlocking mysteries of our sun.

Follow this link to live SDO solar images – https://www.nasa.gov/mission_pages/sdo/the-sun-now/index.html Better still – lose yourself in this stunning timelapse woven from five unblinking years of SDO surveillance.

 

Cassini Reveals Saturn’s Hexagon Border


Oh Cassini, have I mentioned lately how much I admire you? In October 2015, https://notestoponder.wordpress.com/2015/10/29/cassinis-curtain-call/ defined you as NASA’s unassuming civil servant, know that your exemplary service to humanity will never be forgotten.

On April 26, 2017 Cassini embarked on the first of 22 dives toward the heart of Saturn. Sliding dutifully between Saturn’s inner ring and outer atmosphere, Cassini encountered little resistance. Unaware of external trepidation, oblivious to collective relief she wasn’t obliterated by cosmic debris, Cassini documented her journey with stoic pride.

On May 4, 2017 NASA released this video, a Cassini eye view exposing mysteries of Saturn’s hexagon north pole cloud system and central vortex. Images that suggest neighboring hexagon and vortex clouds never mix –

In September 2017 a wild abandon death plunge toward Saturn will terminate the mission. Cameras rolling, Cassini’s demise will cement the legacy of an unassuming civil servant determined to advance science.

Outstanding link to Cassini timeline –

https://saturn.jpl.nasa.gov/the-journey/timeline/#saturn-orbit-insertion

Pondering Cassini’s Imminent Demise


April 26, 2017 marks the beginning of NASA’s Cassini Mission end. Twenty years from home, fuel supplies close to exhaustion, Cassini’s imminent demise starts with the first of 22 planned dives between the rings of Saturn. The final plunge on September 22,2017 will lay Cassini to rest somewhere in the arms of Saturn. Mindful of protecting one of Saturn’s 62 moons from impact of an out of control space probe, Cassini’s assisted suicide is planned to maximize scientific discovery.

http://earthsky.org/space/cassini-at-saturn-grand-finale-2017?utm_source=EarthSky+News&utm_campaign=0b882ebc2e-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-0b882ebc2e-393970565&mc_cid=0b882ebc2e&mc_eid=a5b828713b

Thomas Zurbuchen, associate administrator for the Science Mission Directorate at NASA said – “No spacecraft has ever gone through the unique region that we’ll attempt to boldly cross 22 times. What we learn from Cassini’s daring final orbits will further our understanding of how giant planets, and planetary systems everywhere, form and evolve. This is truly discovery in action to the very end.”

These videos give me goosebumps. Oh Cassini, know your service to humanity mattered.

Timeline of Cassini Mission – https://saturn.jpl.nasa.gov/the-journey/timeline/#saturn-orbit-insertion

 

April 11, 2017 Full Pink Moon


Roughly every twenty nine and a half days, a full moon occurs when sunlight fully illuminates Earth facing side of the Moon. Phases of the Moon are a matter of perspective, perceptible refracted light in relation to lunar orbit define phases of the Moon. We see a full moon when it orbits on the exact opposite side of Earth from the Sun.

Depending on where you live the first full northern hemisphere spring, southern hemisphere fall moon falls on April 11, 2017. Native American  tribes dubbed spring’s first full moon the Pink Moon, named for wild pink ground phlox, the first bloom of spring. Also known as the Flower, Sprouting Grass, Egg and Fish Moon, spring’s first full Pink Moon is believed to have originated on America’s east coast with native Algonquin tribes.

http://fullmoonphases.com/pink-moon/

http://www.space.com/36040-april-full-moon.html?utm_source=sp-newsletter&utm_medium=email&utm_campaign=20170410-sdc

If you happen to fall under pink moonlight, ponder long ago and once upon a time. Gaze into the night, embrace prickles of instinctive wisdom with reverence for people who once called spring’s first full moon pink.Next, listen to Nick Drake’s Pink Moon….

 

2014 JO25


On April 19, 2017 the orbit of 1 km wide asteroid 2014 JO25 will pass 4.6 LD ( 1,768,239 km ) from Earth. In astronomical terms anything within 100 LD is considered a PHA (Potentially Hazardous Asteroid ) 1 LD = distance from Earth to the Moon ( 384,400 km ). Stacked against vastness of the cosmos, 4.6 LD miss by a behemoth projectile amounts to humanity winning the lottery.

2014 JO25 will pass without consequence, no harm no foul. From NASA –

“There are no known future encounters by 2014 JO25 as close as the one in 2017 through 2500. It will be among the strongest asteroid radar targets of the year. The 2017 flyby is the closest by an asteroid at least this large since the encounter by 4179 Toutatis at four lunar distances in September 2004. The next known flyby by an object with a comparable or larger diameter will occur when 800-m-diameter asteroid 1999 AN10 approaches within one lunar distance in August 2027.”

From Earthsky –

“For backyard observers, the exciting news is that asteroid 2014 JO25 might be be visible moving across the stars though 8″-diameter and bigger telescopes. Can it be seen with smaller telescopes? Maybe, but in order to be able to detect its motion across the stars, at least an 8″ scope will be required. The asteroid will not be visible to the unaided eye, as it may show a brightness or magnitude between 10 and 11.

The asteroid is currently located in the direction of the sun, but – during the first hours of April 19 – the space rock will come into view for telescopes as it crosses the constellation of Draco. Then, during the night of April 19, asteroid 2014 JO25 will seem to move across the skies covering the distance equivalent to the moon’s diameter in about 18 minutes.

The asteroid will be close to star 41 Comae, which is very close to Beta Comae. This star is magnitude 4 and thus visible to the unaided eye. Illustration by Eddie Irizarry using Stellarium.

That’s fast enough for its motion to be detected though an amateur telescope. The best strategy to catch the space rock in your telescope is to observe a star known to be in the asteroid’s path, and wait for it.

If you are looking at the correct time and direction, the asteroid will appear as a very slowly moving “star.” Although its distance from us will make the space rock appear to move slowly, it is in fact traveling though space at a speed of 75,072 mph (120,816 km/h)!

Because it will appear to move very slowly, observers should take a good look at a reference star for a few minutes (not seconds) to detect the moving object.

Although asteroid 2014 JO25 will be closest to Earth on the morning of Wednesday, April 19, 2017, (around 7:24 a.m. Central Time / 12:24 UTC) the space rock may look a bit brighter (but still only visible in telescopes) during the night of April 19, because the asteroid will be at a higher elevation in our skies.”

http://earthsky.org/astronomy-essentials/large-asteroid-2014-jo25-close-april-19-2017-how-to-see?utm_source=EarthSky+News&utm_campaign=f53b69e38c-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-f53b69e38c-393970565&mc_cid=f53b69e38c&mc_eid=a5b828713b