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APOD: NGC 2440: Cocoon of a New White Dwarf (2023 Dec 24)
Posted: Sun Dec 24, 2023 5:11 am
by APOD Robot
NGC 2440: Cocoon of a New White Dwarf
Explanation: What's that in the center? Like a
butterfly, a
white dwarf star begins its life by casting off a
cocoon of gas that enclosed its former self. In this analogy, however, the
Sun would be a
caterpillar and the ejected shell of gas would become the
prettiest cocoon of all. In the
featured cocoon, the
planetary nebula designated
NGC 2440 contains one of the
hottest white dwarf stars known. The
white dwarf can be seen as the bright orange dot near the image center. Our
Sun will eventually become a
white dwarf butterfly, but not for
another 5 billion years.
Re: APOD: NGC 2440: Cocoon of a New White Dwarf (2023 Dec 24)
Posted: Sun Dec 24, 2023 8:17 pm
by johnnydeep
This analogy seems strained to me. I'd say that the white dwarf is the egg laid by the butterfly nebula that emerged from the chrysalis of the evolving star. The caterpillar is perhaps the still-forming star prior to the start of fusion. YMMV.
Re: APOD: NGC 2440: Cocoon of a New White Dwarf (2023 Dec 24)
Posted: Mon Dec 25, 2023 3:20 am
by Avalon
So if/when our son goes nova, would the ejected shell envelope the entire solar system and far beyond?
Re: APOD: NGC 2440: Cocoon of a New White Dwarf (2023 Dec 24)
Posted: Mon Dec 25, 2023 3:21 am
by Avalon
P.S. MERRY CHRISTMAS, EVERYONE!
Re: APOD: NGC 2440: Cocoon of a New White Dwarf (2023 Dec 24)
Posted: Mon Dec 25, 2023 7:31 am
by Sa Ji Tario
Feliz Navidad, buena suerte y bon àpetit
ميلاد سعيد ، ونتمنى لك التوفيق والسعادة
З Калядамі, удачы і прыемнага задавальнення
Bon Nadal, bona Feliz Navidad, buena suerte y bon àpetit
Merry Christmas, good luck and bon àpetit
Joyeux Noël, bonne chance et bon àpetit
Frohe Weihnachten, viel Glück und guten Appetit
sort i Bon Apetit
Eguberri on, zorte on eta bon àpetit
Nollaig Chridheil, deagh fhortan agus bon àpetit
Bo Nadal, boa sorte e bon ápetit
Καά Χριστούγεννα, καλή τύχη και καλή ποιότητα
חג שמח, בהצלחה ובון אפטיט
Gleðileg jól, gangi þér vel og bon àpetit
Buon Natale, buona fortuna e buon appetito
メリークリスマス、幸運とボナペティ
Vrolijk kerstfeest, veel geluk en bon àpetit
God jul, lykke til og god tid
Feliz Natal, boa sorte e bon àpetit
Wesołych Świąt, powodzenia i dobrej zabawy
Счастливого Рождества, удачи и приятного аппетита
Счастливого Рождества, удачи и приятного аппетита
Mutlu Noeller, iyi şanslar ve iyi eğlenceler
میری کرسمس ، گڈ لک اور بون پیپیٹ