The breathtaking natural light show that is the Aurora Borealis appeared over Donegal last night.A striking display of green curtains danced across the sky as far south as Ballintra, where it was photographed by Noel Keating.The vivid display is just the beginning of an exciting weekend for aurora hunters. Record levels of solar activity on Wednesday night sparked a high aurora alert for Friday and Saturday all over the northern hemisphere. The lights, which typically appear in Scandinavia and Northern Europe, can be seen in Donegal during times of strong activity.The further north the better they can be seen, and Ireland’s most northerly point at Inishowen is usually an aurora hotspot.Photographer Noel Keating shared his snaps with Donegal Daily today after a late night waiting patiently on the lights. The clouds parted at 2am to reveal the stunning show.Noel said: “I really thought the clouds were never going to clear… what a great vivid display, really enjoyed just sitting back and watching the show.” Aurora Borealis over Ballintra Donegal, 8th September 2017. Photo: Noel Keating PhotographyHe said the lights were so strong that they were visible to the naked eye, which is not often the case. Cameras set to long exposures pick up the colours when the eye does not.There is a good chance of seeing the lights on Friday night leading into Saturday morning if weather conditions are good.Noel shares his aurora advice with Donegal Daily ahead of what could be the best show in a decade:“Get to as dark a location as possible away from street lights and keep an eye on Stackplots for TGO, as this tells you when the Aurora is in the sky. If they see a dip in the RVK line or lines below that, that will indicate that there is aurora visible around our latitude.”In this link you can see the dips from 11pm to 2am. Noel advises clicking the realtime button to refresh page: http://flux.phys.uit.no/cgi-bin/mkstackplot.cgi?MidEu=Mid-Europe&comp=H&day=00&month=00&year=0000&site=tro2a Spaceweather will give all details down left hand side of page too: spaceweather.comThanks to Noel Keating for sharing his photos. You can follow his Facebook here. If you are lucky to capture the aurora this weekend, send your snaps to email@example.com to be featured.Spectacular Northern Lights shine over Donegal was last modified: September 8th, 2017 by Rachel McLaughlinShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window)Tags:Aurora Borealisnoel keating photographynorthern lights
On Earth, humans break from a walk into a run—where both feet are lifted off the ground—when their speed reaches about 2.1 meters per second. Calculations predicted that the transition speed would be lower on the moon due to the reduced gravity, at about 0.86 meters per second, but lab simulations have suggested higher values than that. Short of flying a crew to the moon, the only way to test things out in lunar gravity is by hopping onto NASA’s adapted DC-9 aircraft that can fly a roller-coaster path—so the researchers did just that. During each cycle on the so-called vomit comet, volunteers had 20 to 30 seconds to test out varying walk and run speeds on a treadmill (similar to what’s pictured) when the gravity on them fell to one-sixth of that on Earth. The results confirm that the walk-to-run transition speed is indeed higher than predicted by theory, at an average of 1.42 meters per second. This is possibly due to the additional force that swinging arms and legs exert on the body, as the effect of such force is more pronounced in lunar gravity, the team reports this week in The Journal of Experimental Biology. The researchers hope such studies could lead to more agile space suits.