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Astronomy Picture of the Day 7-31-02
NASA ^
| 7-31-02
| Robert Nemiroff and Jerry Bonnell
Posted on 07/30/2002 9:48:13 PM PDT by petuniasevan
Astronomy Picture of the Day
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2002 July 31
Henize 3-401: An Elongated Planetary Nebula
Credit: R. Sahai (JPL/NASA) et al., HST, NASA, ESA
Explanation: How do dying stars eject their outer layers? Stars that create elegant planetary nebulas like Henize 3-401, pictured above, are not unusual, causing speculation that, one day, our own Sun may look like this. Henize 3-401 is one of the most elongated planetary nebulas yet discovered, a particularly odd feat for a seemingly round star. Perhaps, some astronomers hypothesize, the elongated shape gives a clue to the expulsion mechanism. Genesis hypotheses include that the outer layers of gas are funneled out by the star's own magnetic field, and that a second unseen star is somehow involved. After the gas disperses in a few thousand years, only a white dwarf star will remain. Henize 3-401 lies about 10,000 light years away toward the constellation of Carina.
TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: astronomy; carina; dust; gas; image; magneticfield; nebula; old; photography; planetarynebula; star
Astronomy Fun Fact:Planetary nebulae are named for the supposed resemblance SOME have to the blue-green disks of Uranus and Neptune.
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To: petuniasevan
The sun has preferred directions for its particle bursts doesn't it? Then add in some rotation for a gas and dust cloud like this and the debris seems like it would form a flattened disk in the case of a moderate blow-off. Seems like this shape might be common just thinking about it, and perhaps the old story that our own planets in the solar system were formed this way is the right idea after all.
To: RightWhale
What makes these white dwarfs so special? Can they become stars or planets? &;-)
4
posted on
07/31/2002 3:15:37 AM PDT
by
2Trievers
To: petuniasevan
Thanks ! Nice.
To: petuniasevan
Beautiful!
To: petuniasevan
Astronomy bump !
7
posted on
07/31/2002 6:19:15 AM PDT
by
Ben Bolt
To: 2Trievers
white dwarfs so special? Can they become stars They are stars already. They may have planets created by their own efforts when they were younger and more vigorous.
To: RightWhale
I understand ... it's a lot like a woman's fertility and aging ... I GET it! &;-)
9
posted on
07/31/2002 9:16:13 AM PDT
by
2Trievers
To: petuniasevan
BUMP!
To: petuniasevan
Awsome picture! Keep up the good work, my family learns alot from this site. Thanks!
To: petuniasevan
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