Explore the vast reaches of space and mankind’s continuing efforts to conquer the stars, including theories such as the Big Bang, the International Space Station, plus what the future holds for space travel and exploration.

Topics to Explore


Learn More

'One Small Step' Act Encourages Protection of Human Heritage in Space

The law is the first of its kind by any nation, but how much weight it has is yet to be seen. It is perhaps just one small step to preserve human heritage in space.

Twinkle, Twinkle: The Ultimate Stars Quiz

Stars are giant nuclear fusion reactors and we wouldn't exist without them. Find out how much you know about these twinkling lights with our quiz.

Mark Your Calendars for These 2021 Space Events, Astronomy Fans

Whether it's a solar eclipse, a meteor shower or the launch of the long-awaited James Webb Space Telescope, 2021 has a lot to offer.

Who Named Planet Earth?

All of the planets in the solar system are named for Greek gods, except Earth. So where did the name come from?

Get Ready for the Quadrantids, the First Meteor Shower of the New Year

The Quadrantids are a short but powerful meteor shower that shows up in early January. How can you glimpse it?

Why Are Magnetars So Scary?

A magnetar is a neutron star with a super-strong magnetic field. Astronomers consider them among the scariest objects in the universe, but why?

Mark Kelly Isn't the Only Senator Who's Been to Space

There are four others with this unusual honor. While not every other went from space to the Senate like Mark Kelly, their stories are equally as interesting.

The End of the Arecibo Telescope Is a Huge Loss to Science

Until recently, Arecibo had the biggest radio telescope in the world, and its ability to detect distant signals made it a very powerful tool for studying the universe. It even starred in two movies.

The Great Conjunction of 2020 Is a Celestial Event 800 Years in the Making

You might call it a Christmas miracle. Jupiter and Saturn will align so closely they may look like a double planet. The last time we saw this was in 1226.

How to Find Orion's Belt in the Night Sky

Late November is the perfect time to look for Orion's Belt. If you're new to stargazing, we'll show you how to find it.

Why We Need Artificial Gravity for Long Space Missions

NASA and other agencies have been studying artificial gravity in hopes they will someday use it to help astronauts combat the effects of weightlessness in space. How close are we to that reality?

Leonid Meteor Shower: What You Need to Know

The annual Leonid meteor shower is back, and peaks in the early-morning hours of November 17. It's made up of tiny bits of debris from the comet Tempel-Tuttle. Here's how to see it.

What Really Happened to Yuri Gagarin, the First Man in Space?

He stood just 5 feet, 2 inches. But Gagarin cast an enormously long shadow in space exploration, both for his achievements and his mysterious death.

20 Years on the ISS Proves We Can All Get Along

Humans have now occupied the International Space Station for 20 continuous years. What does this international cooperation say about the future of space exploration?

Why Is an Asteroid Worth $10,000,000,000,000,000,000?

A distant asteroid made mostly of iron is potentially worth $10,000 quadrillion, making it many times more valuable than the global economy.

4G on the Moon? Does That Mean Cell Towers, Too?

NASA is sending astronauts to the moon as soon as 2024. And they'll have 4G cell service when they get there.

7 Eye-catching Facts About the Bright Star Vega

Even if you've never looked through a telescope, you've probably seen Vega, one of the brightest stars in our galaxy. In fact, thousands of years ago, Vega was our North Pole star, and will be again in the future.

The Orionid Meteor Shower Is Back — Here's What You Need to Know

Every autumn, Earth passes through a stream of debris left by Halley's comet, resulting in nighttime meteor showers in mid-October. Best time this year is Oct. 21-22.

Top 10 Moments in Space Bathroom History

When you think about space travel, you probably don't take the time to wonder how astronauts go to the bathroom. However, the annals of aeronautic history abound with space bathroom tales. Here are 10 of our favorites.

How Long Does the Once-dimming Star Betelgeuse Have Left?

Star-gazers gasped when they saw how much Betelgeuse dimmed in 2019 and the reason wasn't clear. Even though it's back up to full strength, how long will it be before it explodes? We haven't seen a supernova in over 400 years.

Does the Real Element 115 Have a Connection With UFOs?

For decades Bob Lazar talked about a mysterious element 115 that supposedly could power alien spacecraft. People thought he was a nut but scientists discovered element 115 in 2003. Was there any connection?

SpaceX Launches 59 Satellites Into Space as Part of StarLink Project

Other companies, like Amazon and Telesat, are planning to emulate StarLink's model, meaning there could soon be as many as 50,000 satellites, mostly for the purpose of internet service, floating around in space.

The Perseid Meteor Shower Is Back — Here's What You Need to Know

It's a celestial gift in the middle of August. Just look up for a spectacular sight.

NASA's Perseverance Rover to Search for Signs of Ancient Martian Life

The Perseverance rover will explore Mars' Jezero Crater, gathering rock samples which may prove that life once existed on the red planet.

How to See NEOWISE, the First Visible Comet in Decades

Comet NEOWISE comes by only once every 6,800 years. But it will be visible to anyone with binoculars or even to the naked eye. Here's how to spot this rare event.