Efrain Morales wrote:Here is an image of Mars taken by me showing a typical ground base (amateur) image showing Mars Curiosity successful landing site region. (LX200ACF 12 in. OTA, CGE mount, Flea3 Ccd, TeleVue 3x barlows, Astronomik LRGB filter set.)
The wonderful astrophotographer César Cantú takes amazing pictures of the sky, and his shots of the Sun are truly cool. On Wednesday, August 8, 2012, he took this image of the Sun and a sunspot called Active Region 1524:
The Sun is a 1970s orange shag carpet!
Actually, César used an Hα filter, which blocks almost all the light from the Sun except for a very narrow slice of color where hydrogen emits light, and in fact this is preferentially given off by hydrogen under the sway of magnetic fields on the Sun, so this image accentuates magnetic activity. You can see lots of structure like the sunspots and the plasma flowing along magnetic fields – especially along the Sun’s edge, where they’re called prominences.
The Sun looks amazingly different depending on how you look at it. Far from being a featureless white disk, it actually has detail all the way down to the resolution of our best telescopes. The surface of the Sun is fiendishly complex, and the amount to understand is equally daunting. And, as usual with astronomy, with this complexity comes astonishing beauty.
Image credit: César Cantú, used with permission.
astrodad wrote:Efrain Morales wrote:Here is an image of Mars taken by me showing a typical ground base (amateur) image showing Mars Curiosity successful landing site region. (LX200ACF 12 in. OTA, CGE mount, Flea3 Ccd, TeleVue 3x barlows, Astronomik LRGB filter set.)
many times at public outreach events I am asked why people cannot see the moonlanding sites, or the flags or the rovers we left behind when looking through my 16-inch Dob. The nominal response is that the moon is a quarter million miles away and we would need a stadium sized telescope, not degraded by Earth's atmosphere to see things of that scale on Luna. Obviously a single rover on Mars would be orders of magnitude more challenging to directly image. Your martian image taken with an SCT is really great. Do you suppose you could be more clear about how impossibly difficult it would be to directly image the MSL from Earth because the way it's depicted on your image could be seen as mighty confusing? For example, maybe do a little math and determine how many miles wide your little red dot would be if it were to scale. Otherwise, it's kind of a disservice to the public's understanding of this great event. They see your big telescope and have no concept of scale. for example, I'll bet that the little red dot on your image that distinguishes Gale Crater is at least several hundred miles across.
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