Rotation & Orbit
The amount of time the Earth's rotation take
How long is 24 hours?
Planets outside our solar system are known by this term.
What are exoplanets?
Through the death of massive stars
How are black holes formed?
The massive and luminous explosion of a star at the final stage of its life
What is a supernova?
A group of stars that appears to form a particular shape in the sky
What is a constellation?
The creation of a star where matters accumulate due to gravity
What is accretion?
What is carbon dioxide?
The boundary arounds a black hole that nothing can escape from
What is an event horizon?
The process of hydrogen nuclei combining to form complex nuclei in the core of a star
What is nuclear fusion?
A massive spiral galaxy that is predicted to collide with our galaxy in about 4 billion years
What is the Andromeda Galaxy?
The tilt of Earth's axis that allows seasons to occur
What is obliquity?
This region is known as "Goldilocks zone" where a planet receives just the right amount of heart to sustain liquid water, a key requirement for life.
What is the habitable zone?
Predicted by general relativity, it is a one-dimensional point at the very centre of a black hole where density and gravity become infinite
What is a singularity?
A classification system that categorizes stars by their spectral types and temperatures
What is the Morgan-Keenan system?
It represents the distance between the Sun and the Earth which is 1.5 x 108 km
What is an astronomical unit?
This planet rotates in a retrograde manner due to tidal forces
What is Venus?
Liquid water cannot remain stable on Mars due to the planet's thin atmosphere and lack of this protective shield
What is a magnetic field?
A system that consists of two black holes orbiting each other due to mutual gravitational attraction. The two black holes gradually spiral inward as they lose energy
What is a binary black hole system?
The smallest and coolest type of main sequence star that makes up 75% of stars in the Milky Way
What is a red dwarf?
A red dwarf star that is the closest star to us other than Sun
What is Proxima Centauri?
Where the sun shines directly overhead during the summer solstice in the Northern Hemisphere
What is the Tropic of Cancer?
This concept highlights the inconsistency between the expected abundance of extraterrestrial life and our complete lack of evidence for it.
What is the Fermi Paradox?
Theory that suggests that black holes slowly evaporate over time by radiating particles away from their event horizon and lose mass. It contradicts quantum theory
The earlier stage of a star's life cycle where matters clump together to create heat
What is a protostar?
A vast, spherical shell of icy objects that marks the gravitational edge of our solar system
What is the Oort Cloud?