Updated November 2, 2026.
These terms explain the rules for using Mundo Hoje (mundohoje.com). By browsing the site, you agree to them. It is a plain agreement with no fine print. Simple as that. If a rule does not seem reasonable to you, the best choice is not to use the site and, if you like, to write to contato@mundohoje.com.
Who edits the site
Mundo Hoje is edited by Arnaldo Jar, which is the editor’s pen name. The About us page explains how we work. You can reach us by email at contato@mundohoje.com or through the form on the Contact page.
What the site offers
The site publishes articles about space and space exploration, with data, dates and sources, and each article names where its figures came from. Everything is informational. Nothing here is a promise. The articles cite their sources and show the date of the last update, but the world changes, and a figure can go stale after publication.
- Space and science: the data comes from agencies and institutions such as NASA and ESA. Mission dates often change.
- Economics and investing: any content on these topics is not a recommendation to buy or sell, and it is not advice. Anyone deciding what to do with their own money should talk to a professional who knows their situation.
- Tools and calculations: results are simulations. They depend on the numbers you enter and on the rules in force, and they can differ from the real value.
Copyright
Mundo Hoje’s articles are original and protected by Brazilian copyright law. Quoting is allowed. Name Mundo Hoje as the source and link to the article. Copying articles, republishing them on another site or selling them requires written permission.
Images carry credit and license information on the page itself, and public-domain and open-license photos follow each author’s rules. Illustrations generated with artificial intelligence are labeled as such.
External links and ads
The site may link to other addresses, such as pages of space agencies and public bodies. Mundo Hoje does not control those sites and is not responsible for what they publish.
The site uses Google AdSense to show ads and Google Analytics to measure its audience. These services use cookies, and the privacy and cookies policy explains what data is processed and how to adjust your choices.
How to use the site
By using the site and the contact form, you agree to three rules.
- Do not send spam or offensive or illegal messages;
- Do not try to break into the site, overload it or copy it automatically at scale;
- Give truthful details when you ask for a reply.
Limits of liability
The editor does everything possible to keep the content correct and current. Errors that are pointed out get corrected. Even so, the site is provided as is and may have faults, as any site can. Mundo Hoje is not responsible for decisions made on the basis of the articles, or for failures outside its control, such as a server outage or attacks on the site.
If you find a mistake, tell us. I check it, fix it and write back.
Changes to these terms
The terms may change, and the date at the top shows the latest version. Continuing to use the site after a change means you accept the new version.
Governing law
These terms follow the laws of Brazil, the country the site is edited from. That is the rule. If a dispute comes up, try a conversation by email at contato@mundohoje.com first, so the matter can be settled without going to court.