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Latest Sun Stories

Solar Winds May Be Warmed By Turbulent Plasma
2012-12-19 10:43:11

Watch the video "Simulated Vision of Solar Wind Turbulence" April Flowers for redOrbit.com - Your Universe Online Scientists have zoomed in on solar wind to reveal the finest detail yet using the European Space Agency's (ESA) Cluster quartet of satellites as a space plasma microscope. They found tiny turbulent swirls that could play a big role in heating the winds. The fact that these winds stay hotter than they current models predict has been a long-standing puzzle in solar physics...

Solar Maximum Is Coming
2012-12-18 19:23:59

Lee Rannals for redOrbit.com — Your Universe Online The sun is revving up and preparing for a new cycle next year, reaching solar maximum during the summer and fall months of 2013. Our star goes through 11-year cycles, roughly. Some cycles can last as long as 14 years or as brief as nine. Despite what the cycle's name suggest, solar storms could be mild during a solar maximum, or severe during a minimum. The sun's cycle is marked from minimum to minimum, making the maximum...

Space Turbulence Measured In The Lab
2012-12-18 05:47:51

[ Watch the Video: Measuring Space Tubulence ] April Flowers for redOrbit.com - Your Universe Online We all know that turbulence exists on Earth, but does it really exist in outer space? And if it does, how would you prove it? A research team from University of Iowa (UI) and the University of California, Los Angeles reports that they have directly measured space wind for the first time in a laboratory. “Turbulence is not restricted to environments here on Earth, but also...

Solar Wind Storms Earth, Enhances Northern Lights
2012-12-17 15:22:33

Lee Rannals for redOrbit.com — Your Universe Online NASA said on Monday that our planet has entered a stream of high-speed solar wind that "escaped" through a coronal hole on the Sun. The solar wind that Earth is passing through has forecasters from the NOAA estimating a slight 20 percent chance of geomagnetic storms, but NASA says that high-latitude residents could benefit from the event. Sky watchers may want to step out into their backyards for the next few nights to...

Evidence Found That Exploding Star Gave Birth To Solar System
2012-12-17 15:00:11

Lee Rannals for redOrbit.com — Your Universe Online University of Chicago researchers wrote in the journal Earth and Planetary Science Letters that they found the radioactive isotope iron 60 low in abundance, and well mixed in solar system material, leading to the notion that the force of an exploding star prompted the formation of the Solar System. Scientists look for remnants of stellar explosions in meteorites to help determine the conditions under which the solar system...

Venus Transit And Lunar Mirror Could Help Find Other Planets
2012-12-14 05:12:06

Lee Rannals for redOrbit.com - Your Universe Online Astronomers reported in the journal Monthly Notices of the Royal Astronomical Society that looking at the sunlight reflected off the Moon during the Venus transit this year helped scientists find planets in orbit around other stars. As Venus passed in front of the Sun on June 6, 2012, it hid part of our sun's rotating surface. Because of rotation, the spectrum of the Sun is slightly different on each side. On one side of the sun,...

Six Minutes In The Life Of The Sun For NASA's EUNIS Mission
2012-12-12 09:12:37

NASA In December, a NASA mission to study the sun will make its third launch into space for a six-minute flight to gather information about the way material roils through the sun's atmosphere, sometimes causing eruptions and ejections that travel as far as Earth. The launch of the EUNIS mission, short for Extreme Ultraviolet Normal Incidence Spectrograph, is scheduled for Dec. 15, 2012, from White Sands, N.M. aboard a Black Brant IX rocket. During its journey, EUNIS will gather a new...

Billions Could Be Saved By New Telescope
2012-11-30 20:32:48

Lee Rannals for redOrbit.com — Your Universe Online A new telescope in Australia could potentially help save the world billions of dollars by providing early warning of massive solar storms. The Murchison Widefield Array (MWA) radio telescope was unveiled on Friday and its ability to keep an eye on the Sun could provide early warning to prevent damage to communication satellites, electric power grids and GPS navigation systems. The low-frequency radio telescope will be capable...

NORUSCA II Camera Examines Auroras
2012-11-29 19:36:55

Lee Rannals for redOrbit.com — Your Universe Online Space-weather researchers joined forces to design and build NORUSCA II in order to help expand the understanding of auroras and other atmospheric events. NORUSCA II is a new camera with the capabilities of simultaneously imaging multiple spectral bands. The camera was tested at the Kjell Henriksen Observatory (KHO) in Svalbard, Norway. The camera produced the first-ever hyper spectral images of auroras and may have already...


Latest Sun Reference Libraries

Stellar Astrophysics
2014-01-12 00:00:00

The prominent feature that allows for the existence of life on Earth is the Sun. Radiation from our closest star provides heat and energy to our planet, driving biological processes and providing the necessary conditions for liquid water to naturally exist. But our Sun is only but one star in this vast Universe. And as it turns out, most stars are quite different than the one that illuminates our day. For this reason, scientists have, for hundreds of years, attempted to study the other...

How Solar Cycles Impact Our Weather Here On Earth
2013-01-13 09:10:34

Solar cycles: what are they and why should we care about them? Solar cycles are made up of what are known as solar minimums (min) and solar maximums (max). We refer to a solar min at the time when the sun is not active with many sunspots, while a solar max is just the opposite when we see a large increase in sunspot activity. So how long do solar cycles last? Typically they run on what is known as an 11 year cycle from the max to the min and then start over again anew. As of 2012 we...

Weather Reference Library
2012-07-23 13:36:11

Being a meteorologist for over thirteen years you start to take note of many things in the atmosphere and how they repeat themselves. Our Climate is no different. The definition of climate is stated as: the collective weather data in regards to moisture and temperature for over 30 years for the same location. So to better understand our climate we need to look at this. First, we have average temperatures for given places based on the 30 year average. Some years the temps are warmer or...

Solar Physics
2012-05-02 19:16:53

Solar Physics is a journal for solar and solar-stellar research and the study of solar terrestrial physics. Founded in 1967 by solar physicist Cornelis de Jager and publisher D. Reidel, the journal treats all aspects of solar physics, ranging from the internal structure of the Sun and its evolution, to outer corona and solar wind in interplanetary space. Solar Physics has four more than forty years been the principal journal for publications of fundamental research on the Sun. It is...

45_677a1afb0bebd7ebfa1c045c737a5541
2010-10-28 18:40:42

The spectroheliograph captures a photographic image of the Sun at a single wavelength of light. The wavelength chosen usually coincides with a spectral wavelength of one of the chemical elements present in the Sun. George Ellery Hale and Henri-Alexadre Deslandres developed I independently in 1890 and was further refined in 1932 by Robert R. McMath to take motion pictures. It operates by using a prism together with a narrow slit that passes a single wavelength. The light focuses on a...

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Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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