I have read the Twilight tetralogy.

Its southern counterpart, the aurora australis (or the southern lights), has features that are almost identical to the aurora borealis and changes simultaneously with changes in the northern auroral zone.

Auroras also occur on other planets.

Richard Pyle dives the reef's Twilight Zone

Protons are also associated with auroras, both discrete and diffuse.

Early evidence for a geomagnetic connection comes from the statistics of auroral observations.

Other processes are also involved in the aurora, and much remains to be learned.

For example, the Gunditjmara people of western Victoria called auroras Puae buae , meaning ashes , while the Gunai people of eastern Victoria perceived auroras as bushfires in the spirit world.

Similar to the Earth's aurora, they are also visible close to the planets magnetic poles.

Predictive techniques are also used, to indicate the extent of the display, a highly useful tool for aurora hunters.

Eight publishers competed for the rights to publish Twilight in a 2003 auction.

Occasionally the resulting modification of the Earth's magnetic field can be so strong that it produces auroras visible at middle latitudes, on field lines much closer to the equator than those of the auroral zone.

The aurora can be seen best at this time, which is called magnetic midnight.

In Medieval Europe, the auroras were commonly believed to be a sign from God.

Scientists around the world are interested in phenomena related to Sun Earth interactions, in particular the aurora.

And you'll see that it leads with a shifting star field, and there's an Aurora Borealis in the background, kind of morphing with color. The color of the Aurora Borealis can be controlled using this single bar of color at the bottom, and we'll put it down here to red.

Such low energies excite mainly the red line of oxygen, so that often such auroras are red.

So this is one that they found, they called the Knife, the Carnival, the Boston Shuffler, Twilight.

It would be a retelling of the events of the novel Twilight , but from the perspective of Edward Cullen.

Some O ions ( conics ) also seem accelerated in different ways by plasma processes associated with the aurora.

In addition, however, Jupiter's moons, especially Io, are powerful sources of auroras on Jupiter.

Fairly high concentration of atomic oxygen and higher eye sensitivity in green make green auroras the most common.

An aurora was also detected on Mars, on 14 August 2004, by the SPICAM instrument aboard Mars Express.

And probably the best part of this piece is at dusk and dawn when the twilight wedge has fallen and the ground's dark, but there's still the light above, bright above.

Early work on the imaging of the auroras was done in 1949 by the University of Saskatchewan using the SCR 270 radar.

At Tromsø and on Svalbard, European incoherent scatter (EISCAT) radars probe the nature of the magnetosphere.

One early theory proposed for the acceleration of auroral electrons is based on an assumed static, or quasi static, electric field and a consequent uni directional potential drop.

It was also later realized that large electric currents were associated with the aurora, flowing in the region where auroral light originated.

In turn, this affects the average probability of opening a door through which energy from the solar wind can reach the Earth's inner magnetosphere and thereby enhance auroras.

PARIS The Northern Lights was the title of a major painting exhibition in Paris a few years ago, dedicated to Scandinavian masterpieces.

Images of auroras are significantly more common today than in the past due to the increase in use of digital cameras that have high enough sensitivities.

Each curtain consists of many parallel rays, each lined up with the local direction of the magnetic field, consistent with auroras being shaped by Earth's magnetic field.

Electrons mainly responsible for diffuse and pulsating auroras have, in contrast, a smoothly falling energy distribution, and an angular (pitch angle) distribution favouring directions perpendicular to the local magnetic field.

By a strange twist of physics, the magnetic disturbance on the ground due to the main current almost cancels out, so most of the observed effect of auroras is due to a secondary current, the auroral electrojet.

Number one If the universe lasts for 10 to the 10 to the 120 years, why are we born in the first 14 billion years of it, in the warm, comfortable afterglow of the Big Bang?

The main findings have been that auroral arcs and other bright forms are due to electrons that have been accelerated during the final few 10,000 km or so of their plunge into the atmosphere.

It was reported by the New York Times that in Boston on Friday 2 September 1859 the aurora was so brilliant that at about one o'clock ordinary print could be read by the light .

The labyrinth is a concept, it's like a twilight zone, it's a place where it's difficult, where you get disoriented, maybe you get scared but you have to go through it if you're going to get to some kind of deep reintegration.

Walter William Bryant wrote in his book (1920) that Tycho Brahe seems to have been something of a homœopathist, for he recommends sulfur to cure infectious diseases brought on by the sulphurous vapours of the Aurora Borealis.

In a matter of three months she had transformed her dream into a complete novel, though she claims that she never intended to publish Twilight and was writing for her own enjoyment.

The bright forms of auroras are produced when downward acceleration not only increases the energy of precipitating electrons but also reduces their pitch angles (angle between electron velocity and the local magnetic field vector).

In northern latitudes, the effect is known as the aurora borealis (or the northern lights), named after the Roman goddess of dawn, Aurora, and the Greek name for the north wind, Boreas, by Galileo in 1619.

Since then an extensive collection of measurements has been acquired painstakingly and with steadily improving resolution since the 1960s by many research teams using rockets and satellites to traverse the auroral zone.

Auroras and the atmosphere Auroras result from emissions of photons in the Earth's upper atmosphere, above , from ionized nitrogen atoms regaining an electron, and oxygen atoms and nitrogen based molecules returning from an excited state to ground state.

Auroral particles The immediate cause of the ionization and excitation of atmospheric constituents leading to auroral emissions was discovered in 1960, when a pioneering rocket flight from Fort Churchill in Canada reveealed a flux of electrons entering the atmosphere from above.