Vocab Pt 1
Telescopes
instruments or tools that allow people to see distant objects
Radiation
form of energy that moves through space as waves or particles
Ripples (in terms of space)
invisible waves that travel through space and stretch and compress anything in their path; gravitational waves
What is a black hole?
an area in space where a huge amount of matter has collapsed into a tiny space.
What is matter made from?
atoms
Hubble Space Telescope
large telescope that orbits Earth and takes pictures of space
atomic particle
the entire atom itself
What is a supernova?
a massive explosion that occurs when a star reaches the end of its life
What are even bigger black holes called?
supermassive
What is gravitational lensing?
the bending of light (that helps determine where dark matter is)
Visible Light
made up of a range of wavelengths that the human eye can see/radiation you can see
subatomic particle
smaller particles that make up an atom, like protons, neutrons, and electrons
In the sentence, "Black holes exhibit substantial gravitational forces," what does "substantial" mean?
powerful, considerable
What percentage of the matter in the Universe is the kind we know about?
15%
What do many black holes have around them?
Many black holes have discs of gas and dust around them.
Ultraviolet Radiation
the type of radiation that causes skin and eye damage
Cosmic rays
high-energy particles that come from space and travel at nearly the speed of light
What do black holes look like?
No one knows, it's impossible to see them
Is the gravity of a black hole strong or weak? Explain.
The gravity of a black hole is so strong that nothing can escape from it, not even light.
What do scientists think dark matter is made of?
particles even smaller than atoms
Infrared radiation
a type of electromagnetic radiation that we can't see, but we can feel as heat
Gamma rays
a type of electromagnetic radiation (EMR) that have a lot of energy and are similar to X-rays
What happens after an object passes into a black hole's event horizon?
The object must eventually enter the black hole.
How do 'stellar-mass' black holes form?
Stellar-mass black holes form when a huge star explodes in a supernova and collapses into a tiny space.
What does gravity depend on?
how much matter something has/how heavy it is