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An active region just over the sun's eastern horizon is cracklingwith solar flares
Space Weather News for Nov. 3, 2010
http://spaceweather.com FARSIDE SOLAR FLARES: An active region just over the sun's eastern horizon is crackling with solar flares and hurling material high above the stellar surface. One of today's flares, a C4-class event, created a wave of ionization in Earth's upper atmosphere despite the fact that the blast site was not directly visible from Earth. The source of this activity appears to be old sunspot 1112, which has spent the last ~12 days transiting the far side of the sun, and is now about to turn back toward our planet. Visit http://spaceweather.com for movies of today's activity and updates. COMET HARTLEY UPDATE: NASA's Deep Impact (EPOXI) probe is closing in on Comet Hartley 2 for a daring flyby on Nov. 4th. The small but active comet is full of surprises, with spinning jets, geysers of cyanide gas, and a strangely pickle-shaped core. Mission scientists expect to reveal first images from the flyby during a press conference on Thursday afternoon, around 4 pm EDT. Tune into NASA TV to follow events live, and meanwhile read this story for a preview: http://science.nasa.gov/science-news.../02nov_epoxi2/ SPACE WEATHER ALERTS: Would you like a call when solar storms erupt? Sign up for Space Weather Phone: http://spaceweatherphone.com |
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An active region just over the sun's eastern horizon is cracklingwith solar flares
On Nov 3, 4:25*pm, Sam Wormley wrote:
...An active region just over the sun's eastern horizon is crackling with solar flares and hurling material high above the stellar surface.... The source of this activity... is now about to turn back toward our planet. Not exactly on topic, but I have an observation that I find curious. This page; http://www.petermeadows.com/html/parallactic.html .... tells me that when facing the sun, with the sun's north pole 'up' and south pole 'down', the sun's east limb is to the left and the western limb to the right. What I find curious is that it is just the opposite for the moon, where east is to the right and west to the left, just like looking a a map of a place on Earth. There may be a good reason why they are different, but to me, this seems to be inconsistent. Why is this? \Paul A |
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An active region just over the sun's eastern horizon iscrackling with solar flares
On 2010-11-04, palsing wrote:
On Nov 3, 4:25*pm, Sam Wormley wrote: ...An active region just over the sun's eastern horizon is crackling with solar flares and hurling material high above the stellar surface.... The source of this activity... is now about to turn back toward our planet. Not exactly on topic, but I have an observation that I find curious. This page; http://www.petermeadows.com/html/parallactic.html ... tells me that when facing the sun, with the sun's north pole 'up' and south pole 'down', the sun's east limb is to the left and the western limb to the right. What I find curious is that it is just the opposite for the moon, where east is to the right and west to the left, just like looking a a map of a place on Earth. There may be a good reason why they are different, but to me, this seems to be inconsistent. Why is this? \Paul A Directions used to be same for the Moon and the Sun. Traditionally, east and west on celestial bodies were the same as east and west in the sky. The western edge was the preceding edge and the eastern edge was the following edge as the object appeared to move in the eyepiece of a stationary telescope. When we started to send landers and astronauts to the Moon they changed the convention for the moon and other celstial bodies so the Sun would rise in the east and set in the west, the same as on the Earth. Bud |
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An active region just over the sun's eastern horizon is cracklingwith solar flares
On Nov 3, 8:47*pm, William Hamblen
wrote: On 2010-11-04, palsing wrote: On Nov 3, 4:25*pm, Sam Wormley wrote: ...An active region just over the sun's eastern horizon is crackling with solar flares and hurling material high above the stellar surface.... The source of this activity... is now about to turn back toward our planet. Not exactly on topic, but I have an observation that I find curious. This page; http://www.petermeadows.com/html/parallactic.html ... tells me that when facing the sun, with the sun's north pole 'up' and south pole 'down', the sun's east limb is to the left and the western limb to the right. What I find curious is that it is just the opposite for the moon, where east is to the right and west to the left, just like looking a a map of a place on Earth. There may be a good reason why they are different, but to me, this seems to be inconsistent. Why is this? \Paul A Directions used to be same for the Moon and the Sun. *Traditionally, east and west on celestial bodies were the same as east and west in the sky. *The western edge was the preceding edge and the eastern edge was the following edge as the object appeared to move in the eyepiece of a stationary telescope. *When we started to send landers and astronauts to the Moon they changed the convention for the moon and other celstial bodies so the Sun would rise in the east and set in the west, the same as on the Earth. Bud OK, that would explain it. Just to make sure I fully understand, are you saying that if I were to look at a map of Mars or any other planet or dwarf planet, or asteroid, for that matter, with north 'up', that west would be to the left and east to the right? Thanks! "I feel a very unusual sensation - if it is not indigestion, I think it must be gratitude." ~Benjamin Disraeli \Paul A |
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An active region just over the sun's eastern horizon iscrackling with solar flares
On 2010-11-04, palsing wrote:
On Nov 3, 8:47*pm, William Hamblen wrote: On 2010-11-04, palsing wrote: On Nov 3, 4:25*pm, Sam Wormley wrote: ...An active region just over the sun's eastern horizon is crackling with solar flares and hurling material high above the stellar surface.... The source of this activity... is now about to turn back toward our planet. Not exactly on topic, but I have an observation that I find curious. This page; http://www.petermeadows.com/html/parallactic.html ... tells me that when facing the sun, with the sun's north pole 'up' and south pole 'down', the sun's east limb is to the left and the western limb to the right. What I find curious is that it is just the opposite for the moon, where east is to the right and west to the left, just like looking a a map of a place on Earth. There may be a good reason why they are different, but to me, this seems to be inconsistent. Why is this? \Paul A Directions used to be same for the Moon and the Sun. *Traditionally, east and west on celestial bodies were the same as east and west in the sky. *The western edge was the preceding edge and the eastern edge was the following edge as the object appeared to move in the eyepiece of a stationary telescope. *When we started to send landers and astronauts to the Moon they changed the convention for the moon and other celstial bodies so the Sun would rise in the east and set in the west, the same as on the Earth. Bud OK, that would explain it. Just to make sure I fully understand, are you saying that if I were to look at a map of Mars or any other planet or dwarf planet, or asteroid, for that matter, with north 'up', that west would be to the left and east to the right? Thanks! "I feel a very unusual sensation - if it is not indigestion, I think it must be gratitude." ~Benjamin Disraeli \Paul A Directions in recent maps, since the 1960s, match terrestrial maps. The relative locations of the features never changed. Only the direction labels changed. Traditionally south was up to match the image in an astronomical telescope in the northern hemisphere. Bud |
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