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The Best Articles in Space

The most useful articles and videos in Space from around the web—beginners to advanced—curated by thought leaders and our community. We focus on timeless pieces and update the list whenever we discover new, must-read articles or videos—make sure to bookmark and revisit this page.

On this page

Top 5 Space Articles

At a glance: these are the articles that have been most read, shared, and saved in Space by Refind users.

  1. How to Make the Universe Think for Us
  2. The race to reclaim the dark
  3. What's the real reason you can't go faster than the speed of light?
  4. A student asked her cosmology professor the meaning of life. Here was his response.
  5. How fast is gravity, exactly?


Watch a video to get a quick overview.

What is ...?

New to Space? These articles make an excellent introduction.

How to ...?

Short Articles

Short on time? Check out these useful short articles in Space—all under 10 minutes.

Long Articles

These are some of the most-read long-form articles in Space.

Related Topics

Thought Leaders

We monitor hundreds of thought leaders, influencers, and newsletters in Space, including:

NASA History Office profile image

NASA History Office

This is the NASA History Office's official Twitter account. We're happy that you share our passion for aerospace history.

NASA profile image


There's space for everybody. ✨

Chris Hadfield profile image

Chris Hadfield

Astronaut, back on Earth after 3 spaceflights. For events and media, please write to Order books at profile image

Science news, Technology news. Physics, Space, Biology, Chemistry, Engineering, Math, Electronics, Nanotechnology, Materials, Computers, Health, Earth Science.


We monitor hundreds of publications, blogs, newsletters, and news sources in Space, including:

Quanta Magazine profile image

Quanta Magazine

Big ideas in science and math. Because you want to know more. Launched by @SimonsFdn. 2022 Pulitzer Prize in Explanatory Reporting.

Big Think profile image

Big Think

Learn from the world’s greatest thinkers. Join us on

The New Atlantis profile image

The New Atlantis

A magazine defending science and technology for, not on, human beings. About: Subscribe:

Singularity Hub profile image

Singularity Hub

Chronicling technological progress in AI, robotics, health, & exponential tech. By @singularityu.

What is Refind?

Every day Refind picks 5 links from around the web for every user, tailored to the user’s interests. Picking only a handful of links means focusing on what’s relevant and useful. We favor timeless pieces—links with long shelf-lives, articles that are still relevant one month, one year, or even ten years from now. These lists of the best resources on any topic are the result of years of careful curation.

How does Refind curate?

It’s a mix of human and algorithmic curation, following a number of steps:

  1. We monitor 10k+ sources and 1k+ thought leaders on hundreds of topics—publications, blogs, news sites, newsletters, Substack, Medium, Twitter, etc.
  2. In addition, our users save links from around the web using our Save buttons and our extensions.
  3. Our algorithm processes 100k+ new links every day and uses external signals to find the most relevant ones, focusing on timeless pieces.
  4. Our community of active users gets 5 links every day, tailored to their interests. They provide feedback via implicit and explicit signals: open, read, listen, share, add to reading list, save to «Made me smarter», «More/less like this», etc.
  5. Our algorithm uses these internal signals to refine the selection.
  6. In addition, we have expert curators who manually curate niche topics.

The result: lists of the best and most useful articles on hundreds of topics.

How does Refind detect «timeless» pieces?

We focus on pieces with long shelf-lives—not news. We determine «timelessness» via a number of metrics, for example, the consumption pattern of links over time.

How many sources does Refind monitor?

We monitor 10k+ content sources on hundreds of topics—publications, blogs, news sites, newsletters, Substack, Medium, Twitter, etc.

Which sources does Refind monitor in Space?

We monitor hundreds of sources in Space, including Quanta Magazine, Big Think, The New Atlantis, The Ringer, Singularity Hub, and many more.

Who are the thought leaders in Space?

We follow dozens of thought leaders in Space, including NASA History Office, Tim Urban, NASA, Chris Hadfield,

Missing a thought leader? Submit them here

Can I submit a link?

Indirectly, by using Refind and saving links from outside (e.g., via our extensions).

How can I report a problem?

When you’re logged-in, you can flag any link via the «More» (...) menu. You can also report problems via email to

Who uses Refind?

100k+ smart people start their day with Refind. To learn something new. To get inspired. To move forward. Our apps have a 4.9/5 rating.

Is Refind free?

Yes, it’s free!

How can I sign up?

Head over to our homepage and sign up by email or with your Twitter or Google account.