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Articles on Space

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Astronomers have found a way to estimate the number of stars in the universe. Comstock Images via Getty Images

How many stars are there in space?

Scientists have a good estimate on the staggering number of stars in the universe.
Thousands of the satellites orbiting Earth are small – like this cubical satellite seen here being released from the International Space Station. NASA

How many satellites are orbiting Earth?

In the past decade, the number of satellites in orbit has skyrocketed thanks to tiny electronics and cheap launches. The crowded night sky is posing problems for astronomers and astronauts.
The James Webb Space Telescope is the biggest orbital telescope ever built and is scheduled to be launched into space on Dec. 18, 2021. NASA/Desiree Stover

James Webb Space Telescope: An astronomer on the team explains how to send a giant telescope to space – and why

The largest orbital telescope ever made will allow astronomers to study the atmospheres of alien planets, learn about how stars form in the Milky Way and peer into the farthest reaches of the universe.
It’s important to understand sex and eroticism in space. (Photo by Nong Vang on Unsplash)

Love and rockets: We need to figure out how to have sex in space for human survival and well-being

As space exploration takes off, it will become increasingly important to study and understand sex, intimacy, desire and pleasure off-Earth.
Four people – none of them trained astronauts – launched into orbit aboard a SpaceX Dragon capsule on Sept. 15, 2021. NASA Johnson/Flickr

SpaceX Inspiration4 mission sent 4 people with minimal training into orbit – and brought space tourism closer to reality

The Inspiration4 mission sent four civilians to space for three days. Though still funded by a billionaire, the mission is a step forward in the nascent space tourism industry.
Shutterstock

Is space infinite? We asked 5 experts

The universe has a finite age — 13.8 billion years to be exact. So if it had a beginning, why is it so difficult to say for sure whether it will have an end?
Both Jeff Bezos and Richard Branson successfully rode to space on rockets made by their private companies Blue Origin and Virgin Galactic, respectively. AP Photo/Tony Gutierrez

Space travel for billionaires is the surprise topic with bipartisan American support – but not from Gen Z

According to a new poll, people across political and demographic lines think the private space race is good for the future but still just an ego trip for the billionaires involved.
Scientists have been studying lunar samples brought back from Apollo missions to understand the geologic history of the Moon. NASA

Moon lacked a magnetic field for nearly all its history – new research resolves mystery sparked by rocks brought back on Apollo

Without a magnetic field, the Moon’s surface is exposed to solar wind. These could have been depositing resources like water and potential rocket fuel on the Moon’s surface for billions of years.
Gravity feels like it’s pulling everything toward Earth, but why? AdventurePhoto/E+ via WikimediaCommons

Why does gravity pull us down and not up?

Gravity is something every person on Earth intuitively understands: It is what keeps you on the ground. But how come gravity pulls down, rather than pushes up? Einstein came up with the answer.
Virgin Galactic’s Unity VSS spacecraft went on a suborbital test flight in May 2021. VIrgin Galactic

What’s a suborbital flight? An aerospace engineer explains

Both Virgin Galactic and Blue Origin are sending spacecrafts – and their billionaire founders – into suborbital flight. But what differentiates a suborbital flight from a trip around Earth?

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