How important are gravitational and relativistic effects for interstellar travel? We consider this question in the context of proposed laser-propelled spacecraft missions to neighboring stellar destin...

This paper proposes a Curved Space Telescope (CST) mission concept: using an E-sail propelled spacecraft to reach the solar gravitational lens focal r…

In the future interstellar exploration at near-relativistic speeds will be possible using beamed energy laser propulsion. With this, spacecraft as small as gm mass picospacecraft become candidates for...

YouTube video by Far Flight

YouTube video by Far Flight

Long-overlooked Kepler signal discovered by citizen scientists reveals promising world worth a closer look

Bold concept calls for sending telescopes 10 times farther than Pluto

YouTube video by NASA Space Tech

Welcome to General Fusion, Dr. Andrew Higgins!    General Fusion and McGill University have collaborated for over a decade, and we’re thrilled to welcome McGill Professor Andrew Higgins to our team du...

The Habitable Worlds Observatory is poised to tell us whether Earthlike planets are common—if it can get off the ground

An abandoned plan to visit another star highlights the perils of billionaire-funded science

A monumental sign of an atmosphere on TRAPPIST-1e could be the precursor to finally finding a living world around another star

YouTube video by Jake Andrew Kurlander

Lightsails are a highly promising spacecraft concept that has attracted interest in recent years due to its potential to travel at near-relativistic speeds. Such speeds, which current conventional cra...

Principium 50 – Contents LEAD FEATURE BOOK REVIEW The Ross 248 Project (<a href="https://i4is.org/wp-content/uploads/2025/08/BOOK-REVIEW-The-Ross-248-Project-Principium50-2508261234.pdf">https://i4is...

With the discovery of the third confirmed interstellar object (ISO), 3I/ATLAS, we have entered a new phase in the exploration of these long-predicted objects.

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Direct images from the James Webb Space Telescope show what could be a Saturn-mass planet around Alpha Centauri.

Teasing the public with fraudulent or self-deluded promises of aliens used to mean something. It took work. It meant slapping together…

In some of its most ambitious work yet, the James Webb Space Telescope looked to spot a planet in a potentially habitable orbit around Alpha Centauri A, the nearest sunlike star to our solar system

Following up on this and this: Today images from the Hubble Space Telescope were published by Jewitt et al., and they show the coma of 3I/ATLAS very well: Would this be enough to convince Avi that it’...

Project Hyperion explores the feasibility of crewed interstellar travel via generation ships, using current and near-future technologies. A generation ship is a hypothetical spacecraft designed for lo...