In awe of God’s creation – Photo of Aurora Borealis or Northern Lights (What are these mysterious lights?)

Northern lights over Ireland – Aurora peste Irlanda

The northern lights, one of several astronomical phenomena called polar lights (aurora polaris), are shafts or curtains of colored light visible on occasion in the night sky.

Polar lights (aurora polaris) are a natural phenomenon found in both the northern and southern hemispheres that can be truly awe inspiring. Northern lights are also called by their scientific name,aurora borealis, and southern lights are called aurora australis.

Sten Odenwald, author of The 23rd cycle, learning to live with a stormy star (New York, Columbia University Press, c2001), provides insight to how northern lights are formed:

The origin of the aurora begins on the surface of the sun when solar activity ejects a cloud of gas. Scientists call this a coronal mass ejection (CME). If one of these reaches earth, taking about 2 to 3 days, it collides with the Earth’s magnetic field. This field is invisible, and if you could see its shape, it would make Earth look like a comet with a long magnetic ‘tail’ stretching a million miles behind Earth in the opposite direction of the sun.

When a coronal mass ejection collides with the magnetic field, it causes complex changes to happen to the magnetic tail region. These changes generate currents of charged particles, which then flow along lines of magnetic force into the Polar Regions. These particles are boosted in energy in Earth’s upper atmosphere, and when they collide with oxygen and nitrogen atoms, they produce dazzling auroral light.

Odenwald further tells us „Aurora are beautiful, but the invisible flows of particles and magnetism that go on at the same time can damage our electrical power grid and satellites operating in space. This is why scientists are so keen to understand the physics of aurora and solar storms, so we can predict when our technologies may be affected.”

Can I see them anywhere?
Yes. Although more frequent at higher latitudes, closer to the poles (such as in Canada, Alaska, Antarctica), they have been seen closer to the equator as far south as Mexico. To view them, look in the direction of the closest pole (the northern horizon in the northern hemisphere, the southern horizon in the southern hemisphere).

Can I see them at any time of the year?
Yes. In some areas, such as Alaska or Greenland, they may be visible most nights of the year. And they occur at any time of the day, but we can’t see them with the naked eye unless it’s dark.

What causes the colors and patterns?
Colors and patterns are from the types of ions or atoms being energized as they collide with the atmosphere and are affected by lines of magnetic force. Displays may take many forms, including rippling curtains, pulsating globs, traveling pulses, or steady glows. Altitude affects the colors. Blue violet/reds occur below 60 miles (100 km), with bright green strongest between 60-150 miles (100-240 km). Above 150 miles (240 km) ruby reds appear.

Fun Facts about northern lights:

  • According to Neil Bone (The aurora: sun-earth interactions, 1996), the term aurora borealis–northern dawn–is jointly credited to have first been used by Pierre Gassendi (1592-1655) and Galileo Galilei (1564-1642), who both witnessed a light display on Sept. 12, 1621. However, Bone also includes a description of the northern lights made 1,000 years prior by Gregory of Tours (538-594.) It included the phrase, „… so bright that you might have thought that day was about to dawn.”
  • Auroras have been observed since ancient times.
  • The height of the displays can occur up to 1000 km (620 miles), although most are between 80-120 km.
  • Auroras tend to be more frequent and spectacular during high solar sunspot activity, which cycles over approximately eleven years.
  • Some displays are particularly spectacular and widespread and have been highlighted in news accounts. Examples include auroral storms of August-September, 1859, Feb 11, 1958, (lights 1250 miles wide circled the Arctic from Oregon to New Hampshire) and March 13, 1989, (the whole sky turned a vivid red and the aurora was seen in Europe and North America as far south as Cuba).
  • Legends abound in northern cultures to explain the northern lights. Some North American Inuit call the aurora aqsarniit(“football players”) and say the spirits of the dead are playing football with the head of a walrus. Often legends warn children that the lights might come down and snatch them away.
  • June 1896, Norwegian Kristian Birkeland, the “father of modern auroral science,” suggested the theory that electrons from sunspots triggered auroras.
  • Yellowknife (Northwest Territories, Canada) is the capital for aurora tourism.
  • The earliest known account of northern lights appears to be from a Babylonian clay tablet from observations made by the official astronomers of King Nebuchadnezzar II, 568/567 BC.
  • Some people claim to hear noises associated with the northern lights, but documenting this phenomenon has been difficult.
  • source – The Library of Congress – Fun facts  http://www.loc.gov/rr/scitech/mysteries/northernlights.html

In awe of His creation – Auroras (northern and southern lights) Aurora diminetii (video)

Psalmi 19  (click for English)

(Către mai marele cîntăreţilor. Un psalm al lui David.) Cerurile spun slava lui Dumnezeu, şi întinderea lor vesteşte lucrarea mînilor Lui.

2O zi istoriseşte alteia acest lucru, o noapte dă de ştire alteia despre el.

3Şi aceasta, fără vorbe, fără cuvinte, al căror sunet să fie auzit:

4dar răsunetul lor străbate tot pămîntul, şi glasul lor merge pînă la marginile lumii. În ceruri El a întins un cort soarelui.

5Şi soarele, ca un mire, care iese din odaia lui de nuntă, se aruncă în drumul lui cu bucuria unui viteaz:

6răsare la un capăt al cerurilor, şi îşi isprăveşte drumul la celalt capăt; nimic nu se ascunde de căldura lui.

7Legea Domnului este desăvîrşită, şi înviorează sufletul; mărturia Domnului este adevărată şi dă înţelepciune celui neştiutor.

8Orînduirile Domnului sînt fără prihană, şi veselesc inima; poruncile Domnului sînt curate şi luminează ochii.

9Frica de Domnul este curată, şi ţine pe vecie; judecăţile Domnului sînt adevărate, toate sînt drepte.

10Ele sînt mai de preţ decît aurul, decît mult aur curat; sînt mai dulci decît mierea, decît picurul din faguri.

11Robul Tău primeşte şi el învăţătura dela ele; pentru cine le păzeşte, răsplata este mare.

12Cine îşi cunoaşte greşelile făcute din neştiinţă? Iartă-mi greşelile pe cari nu le cunosc!

13Păzeşte de asemenea pe robul Tău de mîndrie, ca să nu stăpînească ea peste mine! Atunci voi fi fără prihană, nevinovat de păcate mari.

14Primeşte cu bunăvoinţă cuvintele gurii mele, şi cugetele inimii mele, Doamne, Stînca mea şi Izbăvitorul meu!

VIDEO:

Plasma from solar flares or coronal mass ejections travel along solar wind to ultimately produce aurora’s in Earth’s polar regions. This visually stunning explanatory video takes you on a journey from sun’s interior to the Earth’s upper atmosphere. Credit: NASA/University of Oslo/Arcticlightphoto

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