Supporting Amateur Radio Emergency Communications

SednaToday in history… On November 14, 2003, the most distant object ever found in our solar system, a dwarf planet named Sedna, was discovered by astronomers at the Mount Palomar Observatory.

Sedna has an unusually elliptical orbit around the sun and is twice as far from the sun as any known object in the solar system.  It is about half the size of our moon and is the largest object found in the solar system since Pluto’s discovery in 1930.

QUESTION:

Objects in our solar system orbit around the sun.  It takes Earth one year to orbit the sun.  How many years does it take Sedna, the most distant object in our solar system, to orbit the sun?

 ANSWER:

10,500 years.

EXPLANATION:

Sedna is extremely far from the sun, in the coldest known region of our solar system, where temperatures never rise above minus 400 degrees Fahrenheit. Because it was discovered in such a cold and distant place, its discoverers felt it was appropriate to name it in honor of Sedna, the Inuit goddess of the sea, who is thought to live at the bottom of the frigid Arctic Ocean.

At its most distant, Sedna 84 billion miles from the sun, which is 900 times Earth’s solar distance.  Because of its distance from the sun and its huge elliptical orbit, it takes a while for Sedna to orbit the sun.

Here are some comparisons:

  • Mercury: 88 days
  • Venus: 224 days
  • Earth 365 days
  • Mars: 664 days
  • Jupiter: 11 years, 11 months
  • Saturn: 29 years, 5 and a half months
  • Uranus: 84 years
  • Neptune: 164 years, 9 and a half months
  • Pluto: 248 years, 6 months
  • Sedna: 10,500 years

 NET CHECK-IN’s:

Tonight we had a total of 30 stations check in to the Net.  Of those, only 1 had the correct answer to the Trivia Question. Congratulations to:

  • Murray – WA6USL

Thanks to everyone who supported us by checking in to the Net.

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