Cosmic Perspectives from Amid the Stars:
Astronomy Blog

One of the most iconic scenes in Star Wars is the famous twin sunset over Tatooine, a desert planet that orbits not one, but two stars. Science fiction often takes creative liberties with its fantastic planets, but what about this one? Can a planet really have two suns?

Ask any number of people what the single most important tool in astronomy is, and almost universally, they will claim the telescope as their answer. With telescopes, we’ve been able to peer beyond our world and out into the distant reaches of the universe. The name literally means far-seeing. How is it that these rather simple contraptions are able to show us so much? How do telescopes work?

Everything you can see and touch is made up of matter. Matter is a fundamental building block of the universe. But, somehow, 85% of it is missing. When we look at all the stars, planets, asteroids, and more in a galaxy, we can calculate its total mass. But mass is the source of gravity. And when we measure the gravitational effects of that same galaxy, we get an entirely different mass. The two methods of determining the mass of a galaxy are at odds with one another.

How likely is it that there are intelligent civilizations out there beyond our Solar System? This is the question that Frank Drake asked in 1961 when he came up with the eponymous Drake Equation. In the search for extraterrestrial life, finding an intelligent civilization that we might even be able to communicate with is the gold standard. We might not have found any yet, but given our knowledge of how the universe works, we should be able to predict how common or rare they a

Artemis II brought humanity farther than it's ever traveled before. Along the way they collected a vast array of stunning imagery of not only the Moon, but Earth and space as well. Join me as we explore my favorite of the best images from the Artemis II mission and break down any interesting science behind the photos.

Apollo 13 was supposed to be NASA’s third time landing a crew on the Moon. Instead, it turned into a mission of survival that became one of the most intense chapters in the history of human space flight. An explosion in the oxygen tank put the fate of the mission and its crew in peril. Along the way on their mission to return home safely, the crew of Apollo 13 became the humans to travel farthest from Earth, a record that stood until April 6, 2026, when the crew of Artemis II

The true size of the universe boggles the mind. It’s so large that it is simply impossible to truly grasp its size. Even light, which travels faster than anything else, takes time to travel through space. For light, it’s eight minutes from the Sun to Earth, four years to the closest star, and a hundred thousand years to cross the Milky Way. To truly appreciate these vast distances, a scale model is necessary.

Today, March 24, 2026, NASA announced Space Reactor-1 Freedom, a nuclear-powered spacecraft that’s planned to travel to Mars as early as 2028. Freedom would be the first nuclear-propelled craft to venture beyond Earth orbit and it could be the future of exploration in our Solar System. Traveling to planets beyond our own is a tricky prospect. There’s a reason that humans have never traveled further from Earth than the Moon. But Mars is on the top of our list for places to se

The universe encompasses everything we know to exist. Time itself only has meaning within the universe. It’s impossible to imagine that the universe may have once not existed at all, and yet, that’s the current consensus among cosmologists. The Big Bang is the most widely accepted theory for how the universe began.

The Space Race was the Cold War competition between the United States and the Soviet Union to achieve superior space travel technology, which eventually culminated in the first manned Moon landing and potentially contributed to the collapse of the Soviet Union. Even today, our space programs are built upon the base established during the period. But why was the Space Race so important to both nations, and who ended up winning it?

The solar eclipse is the well-known event when the Moon passes between the Earth and Sun, blocking the Sun from view. Less known is the lunar eclipse, where the Earth passes between the Sun and Moon, blocking the light of the Sun that usually reflects off the Moon. The morning of March 3, 2026, at around 3:00 am PST, will provide this special show of celestial alignment.

Social media is buzzing with news of a so-called “planet parade” on Saturday, February 28. But before you get your hopes up, let’s separate the astronomical reality from the viral hype.

You might have heard before that the nearest star is 4.24 light-years from Earth. Or that the closest galaxy is 2.5 million light-years from the Milky Way. Or even that the most distant observed objects are 33.8 billion light-years away. But how do we measure these distances in space? After all, there’s no such thing as a cosmic ruler. That’s where the cosmic distance ladder comes in.

There is an estimated septillion stars in the observable universe (that’s a one followed by 24 zeroes). They’re everywhere you look and come in all sorts of varieties. Every star is unique, but they all follow a similar life cycle. A star is a ball of gas, usually hydrogen and helium, that is so dense, it can fuse that hydrogen into heavier elements, creating energy. Depending on its size and rate of fusion, a star can live anywhere from a few million years to trillions of

Artemis II is set to bring humans back to the Moon no earlier than February 8. We might be days away from this milestone in space exploration and travel. But what’s the purpose of Artemis II and what’s its mission? Artemis II, the second mission of the Artemis Program, is the first crewed mission to the Moon since Apollo 17 in 1972. While Artemis II won’t be landing on the Moon, it is a pivotal step in our return to the Moon’s surface as well as our travels beyond.

For as long as humans have been telling stories, we’ve dreamed of worlds beyond our own. Today those worlds are no longer mere stories. We live in a golden age of exoplanet discovery. An exoplanet is any planet that exists beyond our Solar System, and since the 1990s, we’ve confirmed over 6,000 of them. It’s safe to assume that planets would exist around other stars. After all, there’s nothing special about the Sun. It’s a very average star.

When you look up at the night sky, you’re not only looking out into space, but also back in time. You’re seeing stars that exist hundreds to thousands of light-years away, and that means you’re looking back hundreds to thousands of years into the past.

The countdown has begun. Part of the groundbreaking Artemis Program, the Artemis II launch is nearly upon us. No later than April of 2026 will Artemis II launch with the first crewed trip to the Moon in over 50 years. Apollo 17 marked the end of an era in 1972 when it departed from the Moon with the final crew to ever make the voyage. Since then, humans have never strayed farther from Earth than low Earth orbit aboard the International Space Station.

Are we alone? It’s a question that humanity has long asked itself. Is the universe beyond this rock we call Earth teeming with life, or is biology a fluke never to be repeated? The only way to know the answers is to hunt for them ourselves.

It’s been over fifty years since the last human set foot on the Moon during the Apollo 17 mission. On December 14, 1972, the last ship of the Apollo Program left the Moon, ending the historic three-and-a-half-year era of discovery and exploration. The Apollo Program was the only time in history where humans went beyond low-Earth orbit and set foot on another celestial body. That’s all about to change.