These lines come from a hot light source behind a cold cloud of gas.
What are absorption lines?
The age of the 1-m telescope in light-polluted Daytona Beach.
What is 10 years old?
_____ _______ were presented to Mexico's Congress in 2023.
What is mummified aliens?
This man:
Who is Christiaan Huygens?
This is how long it would take for you to fall from the North Pole to the core of the Earth (assuming you survive).
What is 19 minutes?
This spectrum is characterized by a smooth broad range of wavelengths in the EM spectrum.
What is a continuous spectrum?
The number of years JWST has been in space.
What is 3 years?
This famous mission to a nearby celestial object is often regarded as fake.
What is the Apollo 11 Moon Landing?
This astronomer bears many similarities to this image:
Who is Isaac Newton?
The true answer to the question "Is water wet?".
What is no?
"This is because most scientists define wetness as a liquid’s ability to maintain contact with a solid surface, meaning that water itself is not wet, but can make other objects wet."
This famous emission line is used to help astronomers see behind interstellar dust.
What is the 21cm line?
This is the age of the Cassegrain telescope design.
What is 353 years old?
Astronomer Ptolemy was able to explain retrograde motion under a geocentric Solar System model using smaller circular orbits called these.
What are "epicycles"?
This astronomer discovered that some stars die via supernovas.
Who is Fritz Zwicky?
This telescope that is a part of the US Extremely Large Telescope Foundation is going to be built in Mauna Kea.
What is the Thirty Meter Telescope (TMT)?
This famous constant is in units of transitions/second and differs from atom to atom.
What is the Einstein A constant?
This is the age of the first gaseous giant in our Solar System.
What is 4.6 billion years old?
This star is sometimes referred to as the "Demon Star" due to it "disappearing" and "reappearing" from sight every couple of days.
What is Algol
This astronomer was the first person to accurately measure a multitude of stars using the stellar parallax method.
Who is Friedrich Bessel?
This is considered the "boundary wall" of our Solar System.
What is the "heliopause"?
This line transition series occurs when an electron transitions from any higher n-value to the n=6 value (the series after the Pfund series).
What is the Humphrey Series?
This is how long ago the first fossil of a crab was discovered.
Astronomer Percival Lowell believed to be seeing dark spokes emanating from Venus in a river-like structure. It turns out he was not looking at Venus but this object instead.
What is "his eye"?
This astronomer was the first person to measure the speed of light.
Who is Ole Rømer?
This is how many teeth a garden snail has.
What is 14,000 teeth?