Astronomy is the formal study of stars, planets, galaxies, and all objects in space.
Who studies planets?
A planetary scientist studies planets, moons, asteroids, comets, and other objects orbiting stars.
These researchers blend astronomy, geology, chemistry, and physics to figure out how planets form, change over time, and might even host life. NASA’s Planetary Science Division backs projects like Mars rover missions or asteroid sample analysis. If this field grabs you, hunt for undergrad programs that mix Earth sciences with astronomy—you’ll get a solid foundation.
What do you call someone who studies stars?
A scientist who studies stars and other celestial objects is called an astronomer.
Astronomers rely on telescopes both on the ground and in orbit—like the Hubble Space Telescope—to gather data on stars, galaxies, black holes, and dark matter. They also run computer simulations to recreate cosmic events. You don’t need a PhD to enjoy stargazing; backyard astronomers regularly help by tracking variable stars or spotting new comets.
What’s the name for a star that’s way bigger than the Sun?
A star that’s significantly larger than the Sun is called a giant or supergiant, with UY Scuti holding the record as the biggest known.
UY Scuti’s radius clocks in at about 1,700 times the Sun’s, making it a red hypergiant. These monsters burn through their fuel fast and usually go out with a dramatic supernova. Don’t expect to see UY Scuti with your naked eye—it’s way too faint—but you can play around with NASA’s StarChild tool to compare its size to the Sun.
Are stars visible in space?
Absolutely—stars are even clearer in space than they look from Earth.
Astronauts aboard the International Space Station (ISS) get an unobstructed view because there’s no atmosphere to blur the light. Their eyes just need a few minutes to adjust to the darkness first. That’s why ISS cameras snap such crisp shots of the Milky Way. Want a peek? NASA’s ISS live stream sometimes catches Earth’s edge against a star-filled sky.
Who’s the wealthiest astronomer?
As of 2026, Neil deGrasse Tyson’s net worth hovers around $5 million.
Neil deGrasse Tyson, born October 5, 1958, is an astrophysicist, bestselling author, and science communicator.
His income mostly comes from books, TV shows like *Cosmos*, and speaking gigs. Compare that to other legends like Carl Sagan, who never raked in the same cash during his lifetime. If you’re eyeing a career in science communication, Tyson’s path proves that media savvy can really pad your wallet.
What’s the term for someone who studies the sky?
Someone who studies the sky is called an astronomer or astrophysicist.
The difference usually boils down to focus: astronomers spend their time observing objects like stars and galaxies, while astrophysicists dig into the physics behind their behavior. Many schools mash these fields together in undergrad and grad programs. Not ready to commit? Try free online courses from Coursera or edX to test the waters.
How old is our galaxy?
The Milky Way is roughly 13.6 billion years old.
That estimate comes from analyzing the oldest stars in globular clusters and measuring how fast the galaxy has been expanding. For scale, the universe itself is about 13.8 billion years old, so the Milky Way formed pretty early on. If you love thinking about deep time, the Hubble Space Telescope has snapped images of some of these ancient stars.
What was the biggest star in the universe back in 2020?
As of 2020 data, UY Scuti still ranked as the largest known star in the universe.
Newer observations (as of 2026) keep confirming UY Scuti’s size, though astronomers keep tweaking the numbers as sharper telescopes come online. For instance, the Very Large Telescope helps scientists measure star diameters with way more precision these days.
What’s the largest known structure in the universe?
The Hercules-Corona Borealis Great Wall is the biggest known structure, stretching about 10 billion light-years across.
This “galactic filament” is basically a gigantic web of galaxy clusters held together by gravity. It makes even huge superclusters like Laniakea—which includes our Milky Way—look tiny by comparison. Picture a noodle-like strand of galaxies stretching across the cosmos. NASA’s Universe site has interactive maps where you can explore these cosmic features yourself.
How many Earths could fit inside the biggest star?
You could squeeze roughly 75 billion Earths inside UY Scuti, the largest known star.
That math comes from comparing volumes: UY Scuti’s radius is about 1,700 times the Sun’s, and the Sun itself could fit around 1.3 million Earths. For a fun visual breakdown, NASA’s Sun fact sheet lays out these numbers in easy-to-digest charts.
Do astronauts cry in space?
They can, but tears don’t roll down—they clump up and can sting or even float away from the eye.
Without gravity, tears just pool on the eye’s surface and can build into uncomfortable blobs. Astronauts use tissues or towels to wipe their faces. NASA’s microgravity guides explain why fluids behave so differently up there.
Can astronauts drink alcohol in space?
Nope—alcohol is banned on the International Space Station (ISS).
The stuff is too volatile and could wreck equipment, plus its diuretic effects mess with waste systems. That said, astronauts have marked special occasions with little treats like freeze-dried ice cream. For the official rules, check out NASA’s ISS experiment guidelines.
Does the Sun shine in space?
It does, but sunlight travels straight without scattering, creating razor-sharp shadows and a blinding white glow.
Down here on Earth, the atmosphere scatters sunlight, giving us blue skies and soft-edged shadows. Up there, the Sun looks like a blazing white disk against endless black. Astronauts wear special filters to protect their eyes when they glance toward it. Want to see for yourself? The NASA Image Library has plenty of shots taken from space.
Who’s considered the greatest astronomer of all time?
Most historians crown Galileo Galilei (1564–1642) as the greatest, thanks to his telescope discoveries and pioneering scientific method.
Galileo’s observations—like Jupiter’s moons, Venus’s phases, and lunar craters—blew open the field of astronomy. His run-in with the Catholic Church over heliocentrism only added to his legend. For a fresh look at his life, the Britannica entry dives deep into his work and legacy.
Who holds the record for youngest astronomer?
Nicole Oliviera, born in 2014, discovered seven asteroids as a child and is recognized as the youngest astronomer.
She took part in the “Asteroid Hunt” citizen-science program, where kids analyze telescope data. Her story shows just how accessible astronomy can be for young minds. Groups like Astronomers Without Borders run programs designed to inspire the next generation of stargazers.
