Space and science news
Science news, checked against the sources
Étoiles & Univers reports on space exploration and astronomical research only when a claim can be traced to a verified publication or a recognized scientific institution. Each article states what is established, what remains a hypothesis, and where to read the primary source.
From the blog
Current dispatches
In-depth background articles on the topics we cover most often, each linking to the sources behind it.
Cosmology
How astronomers measure the expansion of the Universe
A plain-language guide to the distance ladder, what it measures directly, and where the remaining uncertainties lie. Sources: peer-reviewed cosmology papers linked in each article.
Planetary missions
Reading mission updates from space agencies
How to tell a confirmed mission result from a preliminary announcement, and how to find the publication that supports it. Sources: official agency reports and journal references.
Space telescopes
What space telescope observations can and cannot show
An overview of how observatories collect light across wavelengths, and why published results are revised as data are reprocessed. Sources: observatory archives and reviewed articles.
Our method
Facts, hypotheses, and sources kept apart
Before we publish a science story, we check it against the original peer-reviewed article or the recognized institution's release. We separate what has been measured and replicated from what is still a working hypothesis, and we say so in the text.
When a result is preliminary or under debate, we label it as such and link to the sources that support each position. We do not invent discoveries, figures, or events, and we correct any article when a source is revised.