Chapter 1
The trillions within us
Chapter 2
The savior in the storm
Chapter 3
Whispers of the cosmos
Chapter 4
Shadows of folklore
Chapter 5
The playmates of the mind
YOUR GOAL
Master of Our secret partners in mind, body, and space
Ch 3 · Whispers of the cosmos
007skaty Gravitational Wave Background
Can you hear the cosmic whisper? (Hear the whisper!) / Two giant black holes humming in the deep! (Yeah, in the deep!)
007skaty Most planets orbiting other stars are too small and dim to see directly, but their gravitational tugs reveal
007skaty Cosmic dust and distant stars surround the brilliant white dwarf star Sirius B.
BETA
007skaty Decode X-ray signals to discover how a hidden black hole steals gas from its companion.
Fun Fact
Sirius B density: A single teaspoon of the matter from Sirius B, a white dwarf star, would weigh about 5 tons on Earth.
Quiz
What is the name of the method astronomers use to find exoplanets by measuring a star's gravitational wobble?
Quiz
Which space telescope solved the 50-year mystery of Gamma Cassiopeiae's X-rays in March 2026?
Quiz
What percentage of the universe's total mass-energy budget is made up of invisible dark matter?
Quiz
What type of stellar remnant is Sirius B, the dense, invisible companion of Sirius?
Quiz
Which astronomer's 1970s work on galaxy rotation rates proved the existence of invisible dark matter?
Quiz
The Dogon people, who possessed ancient knowledge of Sirius B, are native to which African nation?