supernova på dansk

Eksempler på supernova

• One night in 1572, Danish astronomer Tycho Brahe saw what he thought was a brilliant new star in the constellation Cassiopeia. (We now know he was observing a supernova.) In 1604, a second supernova was observed. These discoveries caused scientists to seriously question Ptolemy's theory that all stars were contained in an outermost sphere of the universe that never changed.
• En nat i 1572 så den danske astronom Tycho Brahe, hvad han troede var en strålende ny stjerne i stjernebilledet Cassiopeia. (Vi ved nu, at han faktisk observerede en supernova.) I 1604 blev en anden supernova observeret. Disse opdagelser fik videnskabsfolk til alvorligt at stille spørgsmålstegn ved Ptolemaios' teori om, at alle stjerner var indeholdt i en yderste sfære af universet, der aldrig ændrede sig.

• In large size stars, nuclear fusion will continue until iron is formed. In stars, iron acts like an energy sponge. It soaks up the star's energy. This energy is eventually released in a big explosion called a supernova.
• I stjerner af stor størrelse vil kernefusionen fortsætte, indtil jern dannes. I stjerner virker jern som en energisvamp. Det suger stjernens energi op. Denne energi frigives til sidst i en stor eksplosion kaldet en supernova.