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Mike Simonsen
1,583 followers -
astronomer, musician, writer, master gardener, enthusiastic cook, husband, father, cat lover, madman
astronomer, musician, writer, master gardener, enthusiastic cook, husband, father, cat lover, madman

1,583 followers
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The New Supernovae Alphabet Soup
This is an update of the Simostronomy blog “Supernovae Alphabet Soup”
posted December 2011. Thanks to Brad Walter for the revised text. SN 2011fe aka PTF11kly Image: Wikipedia The International Astronomical Union (IAU) is the sole body responsible
for the o...

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My publications record
Query Results from the ADS Database Go to bottom of page Selected and retrieved  59  abstracts.    Sort options   Sort by date   Sort by citations   Sort by normalized citations   Sort by author   Sort by author count   Sort by page (ToC sort)  Bibcode ...

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About two-thirds of all stars within 81 light years (25 parsecs) of Earth are binary or part of multi-star systems. Younger star and protostar populations have a higher frequency of multi-star systems than older ones, an observation that ties in with Boss’ findings that many single-star systems start out as binary or multi-star systems from which stars are ejected to achieve stability.

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This is the largest subsidence that has been observed in Iceland since measurements of the surface were begun over fifty years ago. 

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I know someone who has fully restored an 8-inch Dynamax telescope with some AAVSO historical significance, it was owned by George Van Biesbroeck, who would like to sell this to someone who will appreciate the unique value it has because of its connection to this famous astronomer (and AAVSO Council member).  http://en.wikipedia.org/wiki/George_Van_Biesbroeck
If you are interested, contact me and I'll put you in touch with the seller.
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“ALMA has now given us the best view yet of a binary star system sporting protoplanetary discs  — and we find that the discs are mutually misaligned!” said Eric Jensen, an astronomer at Swarthmore College in Pennsylvania, USA.

The two stars in the HK Tauri system, which is located about 450 light-years from Earth in the constellation of Taurus (The Bull), are less than five million years old and separated by about 58 billion kilometres — this is 13 times the distance of Neptune from the Sun.

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The first class in the CHOICE fall schedule is now open for registration!
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