Lyt når som helst, hvor som helst

Nyd den ubegrænsede adgang til tusindvis af spændende e- og lydbøger - helt gratis

  • Lyt og læs så meget du har lyst til
  • Opdag et kæmpe bibliotek fyldt med fortællinger
  • Eksklusive titler + Mofibo Originals
  • Opsig når som helst
Start tilbuddet
DK - Details page - Device banner - 894x1036

Stars in the Dark: The Relationship between Galaxies and Dark Matter

Længde
1T 50M
Sprog
Engelsk
Format
Kategori

Fakta

For centuries, humans have gazed into the night sky, believing that what they saw—stars, planets, glowing nebulae—was all there was. But as our tools for exploring the universe improved, scientists began to notice something strange. The visible matter in galaxies simply wasn’t enough to explain how those galaxies moved and behaved. Something unseen, something invisible, seemed to be exerting a powerful influence on everything.

In the 1930s, astronomer Fritz Zwicky was studying a group of galaxies known as the Coma Cluster. When he measured how fast the galaxies within the cluster were moving, he realized they were traveling far too quickly to be held together by the visible matter alone. According to the laws of gravity, the cluster should have torn itself apart. Zwicky proposed that some kind of “missing mass” must be present, something that added gravitational force without emitting light. He called it “dark matter.” At the time, his idea was mostly ignored.

Decades later, in the 1970s, American astronomer Vera Rubin provided even more compelling evidence. She was studying the rotation of spiral galaxies, expecting that stars farther from the center would orbit more slowly, just as planets farther from the sun move more slowly in our solar system. But that wasn’t what she found. The outer stars were moving just as fast as those closer in, a finding that didn’t make sense if only visible matter was involved. Her work suggested that some unseen material—something with mass—was surrounding the galaxies in large halos, exerting gravitational pull and affecting their motion. This was dark matter at work.

© 2025 Swenson Thing LLC (Lydbog): 9798318231711

Release date

Lydbog: 12. april 2025

Vælg dit abonnement

  • Over 600.000 titler

  • Download og nyd titler offline

  • Eksklusive titler + Mofibo Originals

  • Børnevenligt miljø (Kids Mode)

  • Det er nemt at opsige når som helst

Flex

For dig som vil prøve Mofibo.

89 kr. /måned
  • 1 konto

  • 20 timer/måned

  • Gem op til 100 ubrugte timer

  • Eksklusivt indhold hver uge

  • Fri lytning til podcasts

  • Ingen binding

Prøv gratis
Den mest populære

Premium

For dig som lytter og læser ofte.

129 kr. /måned
  • 1 konto

  • 100 timer/måned

  • Eksklusivt indhold hver uge

  • Fri lytning til podcasts

  • Ingen binding

Start tilbuddet

Unlimited

For dig som lytter og læser ubegrænset.

149 kr. /måned
  • 1 konto

  • Ubegrænset adgang

  • Eksklusivt indhold hver uge

  • Fri lytning til podcasts

  • Ingen binding

Start tilbuddet

Family

For dig som ønsker at dele historier med familien.

Fra 179 kr. /måned
  • 2-6 konti

  • 100 timer/måned pr. konto

  • Fri lytning til podcasts

  • Kun 39 kr. pr. ekstra konto

  • Ingen binding

2 konti

179 kr. /måned
Prøv gratis