Space News & Blog Articles

Many factors influence a planet's habitability. The more obvious ones include being in a star's habitable zone and having a magnetic shield to protect it from radiation. But other important factors are less obvious.

The Moon paves the way among the planets in the last half of February.

Dark energy is one of those cosmological features that we are still learning about. While we can’t see it directly, we can most famously observe its effects on the universe - primarily how it is causing the expansion of the universe to speed up. But recently, physicists have begun to question even that narrative, pointing to results that show the expansion isn’t happening at the same rate our math would have predicted. In essence, dark energy might be changing over time, and that would have a huge impact on the universe’s expansion and cosmological physics in general. A new paper available in pre-print on arXiv from Dr. Slava Turyshev, who is also famously the most vocal advocate of the Solar Gravitational Lens mission, explores an alternative possibility that our data is actually just messy from inaccuracies in how we measure particular cosmological features - like supernovae.

Nobody expects hydrogen sulphide to smell pleasant. The molecule responsible for the distinctive odour of rotten eggs hardly suggests breakthrough science. Yet its detection in the atmospheres of four distant gas giants has just answered one of planetary science's most fundamental questions: what makes a planet a planet?

The arrival of 3I/ATLAS in our Solar System spawned multiple proposals for a rendezvous mission to study it up close. As the third interstellar object (ISO) ever detected, the wealth of information direct studies could provide would be groundbreaking in many respects. However, the mission architecture for intercepting an interstellar comet poses numerous significant challenges for mission designers and planners. Chief among them is the technological readiness level (TRL) of the proposed propulsion systems, ranging from conventional rockets to directed-energy propulsion (DEP).

At just 500 kilometres across, Saturn's sixth largest moon would fit comfortably inside my home country, the United Kingdom with room to spare. Yet new research reveals this tiny ice world wields electromagnetic influence over distances exceeding half a million kilometres, more than the distance between Earth and the Moon.

Earth's radiation budget, that’s the balance between incoming sunlight and outgoing heat, drives our climate system. Understanding it requires measuring radiation escaping from every corner of our planet, but current satellite observations face a fundamental trade off. Low Earth orbit satellites provide detailed snapshots but miss temporal continuity, whilst geostationary satellites maintain constant watch but can't see the whole globe at once. Time for an unusual solution, enter an unlikely observation platform: the Moon.

The European Space Agency, Arianespace, and ArianeGroup conducted the first launch of the Ariane 6 rocket in July 2024. This three-stage expendable launch system uses a main-stage and upper-stage rocket with strap-on boosters. Designed to succeed the Ariane 5 launch vehicle, this latest member of the rocket family was designed to offer greater versatility and payload capacity than its predecessors. In its original configuration, the Ariane 62, the rocket had two strap-on boosters, giving it a medium payload capacity of 10,350 kg (22,820 lb) to Low Earth Orbit (LEO) and 4,500 kg (9,900 lb) to geostationary orbit (GSO).