E probably wants to know how long ago it was the last time that galaxies were the topic of astronomy. As do I. I think I remember reading that there are three astronomy topics on a three-years-each rotation, so perhaps it was back in 2001? That's largely speculation, though.sciolykid101 wrote:the galaxies for 2010 is posted on the thread already also variable stars was 2009, not galaxiescrabnebula143 wrote:Does anyone know the last year galaxies was an event for astronomy???
thanks!
Astronomy C
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Anarch
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Re: Astronomy C
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tad_k_22
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Re: Astronomy C
Think '03.
Old Events:
Astronomy, Remote Sensing (Both Mars and Global Warming), Dynamic Planet (Oceanography/Earthquakes and Volcanoes), It's About Time, Technical Problem Solving, and I really don't want to count, but did fail at-Fermi Questions.
Astronomy, Remote Sensing (Both Mars and Global Warming), Dynamic Planet (Oceanography/Earthquakes and Volcanoes), It's About Time, Technical Problem Solving, and I really don't want to count, but did fail at-Fermi Questions.
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crabnebula143
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Re: Astronomy C
Thank you! 
BC / Harriton High School
'We say we love flowers, yet we pluck them. We say we love trees, yet we cut them down. And people still wonder why some are afraid when told they are loved.'
'Having dined on their companions, they now lie at the center of the cluster, waiting for more food to arrive.'
'We say we love flowers, yet we pluck them. We say we love trees, yet we cut them down. And people still wonder why some are afraid when told they are loved.'
'Having dined on their companions, they now lie at the center of the cluster, waiting for more food to arrive.'
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Nathan58
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Re: Astronomy C
Yeah, so basically the event this year is mostly about galaxies. I'm really happy that were off the topic of variable stars. I've been stuck with variable stars for too long. Good thing the board made something new!!!crabnebula143 wrote:Aren't cepheids and RR Lyrae's used to determine distances to galaxies?
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crabnebula143
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Re: Astronomy C
I feel really stupid for asking this but then why are they putting in binaries, such as M33 X-7?
Thanks!
Thanks!
BC / Harriton High School
'We say we love flowers, yet we pluck them. We say we love trees, yet we cut them down. And people still wonder why some are afraid when told they are loved.'
'Having dined on their companions, they now lie at the center of the cluster, waiting for more food to arrive.'
'We say we love flowers, yet we pluck them. We say we love trees, yet we cut them down. And people still wonder why some are afraid when told they are loved.'
'Having dined on their companions, they now lie at the center of the cluster, waiting for more food to arrive.'
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Nathan58
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Re: Astronomy C
Probably because Epsilon Aurigae is still on the list. They probably wanted to have more than one binary so there could be another catagory. It would be weird if there was only one binary system.
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crabnebula143
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Re: Astronomy C
Does anyone know why A-type stars have the strongest H absorption lines? thnx.
BC / Harriton High School
'We say we love flowers, yet we pluck them. We say we love trees, yet we cut them down. And people still wonder why some are afraid when told they are loved.'
'Having dined on their companions, they now lie at the center of the cluster, waiting for more food to arrive.'
'We say we love flowers, yet we pluck them. We say we love trees, yet we cut them down. And people still wonder why some are afraid when told they are loved.'
'Having dined on their companions, they now lie at the center of the cluster, waiting for more food to arrive.'
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Flavorflav
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Re: Astronomy C
Any hotter than A and helium becomes dominant.crabnebula143 wrote:Does anyone know why A-type stars have the strongest H absorption lines? thnx.
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Glacierguy1
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Re: Astronomy C
Any hotter than A and the Hydrogen completely dissociates with its electrons, so there can be no absorption lines
SAVE OUR GLACIERS.
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