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National Solar Observatory Predicts Shape of Solar Corona For August Eclipse (phys.org)

bsharma shares a report from Phys.Org: August 21st will bring a history-making opportunity for the entire United States. On that day, every person in the country, including Hawaii and Alaska, will have an opportunity to witness at least a partial solar eclipse as the moon moves in front of the Sun. If you have the good fortune to be along the path of totality, stretching from Oregon to South Carolina, you will get to witness one of the most awe-inspiring views in nature -- the wispy wonders of the solar corona. But there is more to the corona than one might initially realize.

Dr. Gordon Petrie from the National Solar Observatory (NSO) explains: "The corona might look like it's a fuzzy halo around the Sun, but it actually has quite a lot of structure to it. The Sun has a magnetic field that, at first glance, might remind us of the middle-school experiment where you sprinkle iron filings over a bar magnet to get a butterfly shape. However, on closer inspection, it is far more complicated than that. Since we are exactly one solar rotation away from the solar eclipse, we're able to use today's observations to predict the structure of the corona on Aug. 21st," says Petrie. "The corona is not likely to change too much between now and the eclipse, unless we get lucky and a large active region appears! We expect to see faint, straight structures protruding from the north and south poles of the Sun -- these are the polar plumes. We will be able to see brighter bulbs of material closer to the equator -- these are called helmet streamers."

16 comments

  1. Anthropic convenience by Empiric · · Score: 1

    Nice of the moon to have evolved to be of such a precise size and relative distance as to so aesthetically occlude the Sun.

    --
    ~ Whence do you come, slayer of men, or where are you going, conqueror of space?
    1. Re:Anthropic convenience by Gavagai80 · · Score: 2

      Not so nice for those who have to settle for annular eclipses when the moon is too far away. We need a bigger moon, time to crash some asteroids into it.

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      This space intentionally left blank
    2. Re:Anthropic convenience by 93+Escort+Wagon · · Score: 2

      I was going to make a joke about the moon's small size being due to evaporation caused by anthropogenic global warming; but I was worried some people here would think I was being serious.

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      #DeleteChrome
    3. Re:Anthropic convenience by Anonymous Coward · · Score: 0

      That's no moon!

    4. Re:Anthropic convenience by geantvert · · Score: 1

      It seems to me that the cosmic engineer fucked up its aesthetically design. The apparent sizes of the Moon and of the Sun vary significantly (because orbits are elliptical instead of circular) so their relative apparent sizes vary by -10% to 10%. Also, if the moon orbit was aligned with the ecliptic, solar eclipses would be a lot more frequent.

    5. Re:Anthropic convenience by rgbatduke · · Score: 2

      ...for a narrow time window. The moon gets a bit more than 3 cm farther from the earth every year due to rotational energy coupling through the tides. We are in the comparatively narrow time window (geologically speaking) where the moon and the sun have roughly the same angular width as seen from the earth (depending on just where the moon is in its elliptical orbit and where the earth is in ITS elliptical orbit). Wait a million years or so and the moon will produce only annular eclipses.

      It's like Polaris as the North Star. Fiction writers like to portray Jesus or Moses or Caesar looking north and waxing poetic about the Nort Star, but a couple of thousand years ago Polaris wasn't the North Star, we had no North Star. Even a few hundred years from now it is going to be making circles instead of behaving like a fixed point on time lapse photographs. Sigh.

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      Even when the experts all agree, they may well be mistaken. --- Bertrand Russell.
  2. Why you need to go to Church by Anonymous Coward · · Score: 0, Troll

    Then the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled for the fear of the Jews, came Jesus and stood in the midst, and saith unto them, Peace be unto you. And when he had so said, he shewed unto them his hands and his side. Then were the disciples glad, when they saw the Lord. Then said Jesus to them again, Peace be unto you: as my Father hath sent me, even so send I you. And when he had said this, he breathed on them, and saith unto them, Receive ye the Holy Ghost:

    Whosesoever sins ye remit, they are remitted unto them; and whosesoever sins ye retain, they are retained.

    And after eight days again his disciples were within, and Thomas with them: then came Jesus, the doors being shut, and stood in the midst and said, Peace be unto you. John 20:19-23, 26

    Not many people know the true reason why Jesus started the church. Let me give a couple of things which are not legitimate reasons, even though most people think they are.

    1. The church was not started to be a place of worship.

    You can worship God better alone than you can with others. You can also pray better alone than you can with others. When two people pray together, their prayers will too often be designed to impress each other. Every Christian should worship God in the beauty of His holiness. We should adore Him, worship Him, magnify Him, and honor Him. The idea that the church is a place to worship God came from Rome, not from the New Testament. There is only one place in the New Testament where the word worship is connected to a public service, and that deals with worshipping the Devil. There is no example in the entire New Testament of a Christian worship service.

    God told the people in Amos 5:21-23, 1 hate, I despise your feast days, and! will not smell in your solemn assemblies.... I will not accept them.... Take thou away from me the noise of thy songs.... The church was not made to be a place of worship.

    2. Jesus did not start the church as a place of evangelism.

    The evangelistic church is not in the Bible. The soul-winning church is. I am not against people getting saved at church, nor am I against an occasional evangelistic sermon. But, that is not the main purpose of the church, nor was it why the church was started. The New Testament church was a soul-winning institution where all of the members won people to Jesus.

    And daily in the temple, and in every house, they ceased not to teach and preach Jesus Christ. Acts 5:42

    Some people believe that the New Testament church won the lost in the church and in house-to-house soul winning. That is half true. They did go house-to-house soul winning. The temple, however, was not the church, nor did they have church in the temple. The temple was the location of the big gala occasion when they had their feasts and when all of the people would gather in Jerusalem. The temple was also the place where they conducted their daily business. It was like our business district. This was not talking about witnessing in church, but about witnessing in public places as well as in people's homes.

    And Saul was consenting unto his death. And at that time there was a great persecution against the church which was at Jerusalem; and they were all scattered abroad throughout the regions of Judaea and Samaria, except the apostles. Therefore they that were scattered abroad went every where preaching the word. Acts 8:1, 4

    They witnessed everywhere. There was no place they did not go. The jail is part of everywhere. Downtown is part of everywhere. The street corner is part of everywhere. Rest homes are a part of everywhere. Neighborhoods are a part of everywhere. The homes where the poor, the lame, the halt, and the blind live are parts of

    1. Re:Why you need to go to Church by Fear+the+Clam · · Score: 1

      Yeah, whatever, pal. Suck my helmet streamer.

    2. Re:Why you need to go to Church by Anonymous Coward · · Score: 0

      Yeah, whatever, pal. Suck my helmet streamer.

      Heh. He'll need to wear welding goggles though.

    3. Re:Why you need to go to Church by Anonymous Coward · · Score: 0

      LOL can you suck your own dick? I bet you can. I read between the lines.

  3. see by Anonymous Coward · · Score: 0, Offtopic

    see Muhammad
    there he stands
    see his filthy groping hands
    his sword many good men has cut
    his wife aisha is a slut
    nothing is to me more vile
    than this false prophet paedophile

  4. get a solar magnet powered star car.. by Anonymous Coward · · Score: 0

    & drive to the scene, within seconds? each our very own reward.. cease fire stand down,, there's moms & babys all around.. some still calling this 'weather'? thanks again

  5. free the (also) innocent stem cells by Anonymous Coward · · Score: 0

    so we won't be too sick or dead to enjoy the reward round of our everlasting spirit based journey... hand in hand it says...

  6. "Roundish" by Anonymous Coward · · Score: 0

    A bit like the sun, but without the bright part.

    1. Re:"Roundish" by dcw3 · · Score: 1

      I hate that an AC beat me to this. Bravo sir.

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      Just another day in Paradise
  7. Shape of the sun? by Anonymous Coward · · Score: 0

    "Science" ladies and gentlemen. No doubt brought to you by the same SJW's and betas who push evolution and global warming.