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Inspiring Earth's Next Generation of Explorers Since 2012

Astronomy Milky Way

When you wish upon a star, is it already dead?

July 28, 2025

Curious Kids Universe

How many stars are there in the Universe?

July 25, 2025

Curious Kids Moon

Why do some planets have moons and others don’t?

July 24, 2025

Curious Kids Earth

How has the inside of the Earth stayed hot for billions of years?

July 23, 2025

Curious Kids Mars

Is Mars really as red as people say it is?

July 22, 2025

Newest Articles

Earth’s magnetic field moves, flips, and protects us from radiation

Ofer Cohen June 26, 2025

Unravelling the mystery behind the Big Bang birth of the universe

Konstantinos Dimopoulos June 23, 2025

Where does Mars exploration stand a decade removed from ‘The Martian’ release?

Ari Koeppel June 20, 2025

The SpaceX Falcon 9 rocket and Crew Dragon capsule stand vertically atop Launch Complex 39A at NASAs Kennedy Space Center in Florida ahead of an aborted launch attempt of the Axiom 4 commercial crew mission to the International Space Station. Credit: Ken Kremer

Axiom-4 commercial astronaut mission to ISS scrubs due to LOX leak

Ken Kremer June 17, 2025

X-rays reveal a mysterious cosmic object never before seen in galaxy

Ziteng Wang June 16, 2025

Brief history of how we brought the stars indoors to planetariums

Martin Bush June 12, 2025

Rubin Observatory assembling the most complete time-lapse record of the universe

Noelia Noël June 9, 2025

New model helps to figure out which distant planets may host life

Daniel Apai June 5, 2025

Shelf Space

Jerome Pohlen brings alive ‘The Apollo Missions for Kids’

‘Rocket to the Moon’ with the multitalented Don Brown

Surviving on Mars with ‘The Martian’ author Andy Weir

QuizMe: Space Quizzes

QuizMe: Russian Space Program

QuizMe: Jupiter

QuizMe: Mercury

Interviews

Charley Kohlhase has been our ambassador to the planets

Jack King: The Voice of Apollo

Buzz Aldrin: It’s time to colonize the Red Planet

Brian Greene and the challenges of physics

Word Games & More

NASA’s Mars 2020 Mission Crossword

Space Shuttle Atlantis Word Search

SpaceX Crew Demo-2 Launch Word Search

Hubble Space Telescope Word Search

Kennedy Space Center Word Search

Ice and Stone 2020 Word Search #2

Ice and Stone 2020 Word Search

Word Find • March 2017

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Astronomy

Rubin Observatory assembling the most complete time-lapse record of the universe

Why meteorites have less water than the asteroid bits returned by space probes

James Webb Space Telescope being tested on Earth

James Webb Space Telescope: How to send a giant telescope to space – and why

5 ways families can enjoy astronomy during the pandemic

Earth

Four astronomical discoveries from ancient Greece

From the pyramids to Stonehenge – were prehistoric people astronomers?

Grounded by pandemic, NASA interns keep researching

International Space Station

Boeing slates Starliner test flight to ISS; SpaceX readies Crew-2 mission

Why the International Space Station is riddled with bacteria

Getting to sleep in space is hard – and not exactly restful for the mind and body

Why are scientists trying to manufacture organs in space?

Lunar Exploration

Landing on the Moon is still an incredibly difficult feat in 2025

China’s Chang’e-5 returns first lunar rock samples since 1976

lunar lander mockup science class

Blue Origin-led team delivers lunar lander mockup to NASA

Mars

Mars may have once had a carbon cycle more favorable for life

Ingenuity ready for historic first flight on Mars

Keeping Earth’s germs from contaminating Mars

Wheels in motion for NASA’s newest Mars rover

Solar System

Voyager 1 thrusters, inoperable for 21 years, fixed from 15 billion miles away

New theory explains how water first arrived on Earth

QuizMe: Our Solar System

Universe

Unravelling the mystery behind the Big Bang birth of the universe

Rubin Observatory assembling the most complete time-lapse record of the universe

New model helps to figure out which distant planets may host life

Extraordinary evidence needed to claim discovery of extraterrestrial life

Ice and Stone

Comet of the Week: Lovejoy C/2011 W3

Special Topic: Formation of the Planets

This Week in History: December 13-19

Comet of the Week: The Great Comet of 1680