Facts Worth Sharing
- Hope is a United Arab Emirates mission to Mars that arrived in orbit on 9 February 2021.
- The mission will build a complete picture of Mars' climate, helping scientists better understand what Mars was like when its atmosphere could have supported life.
- Hope is the Arab world's first mission to another planet. More countries exploring our solar system means more discoveries and opportunities for global collaboration.
Why We Need Hope
Mars is a cold, dry, desert, with a carbon dioxide-filled atmosphere 100 times thinner than Earth’s. But it wasn’t always like that. We know liquid water once flowed on its surface, supported by an atmosphere that may have been favorable to life.
But then something happened. About 3 billion years ago—right around the time life arose on Earth—Mars lost its magnetic field. On Earth, our magnetic field shields us from the solar wind, the constant stream of charged particles coming from the Sun. Without a magnetic field for protection, the solar wind stripped away much of Mars’ atmosphere, eventually transforming the planet into its current state. NASA's MAVEN spacecraft, which is still at Mars, made these findings.
Hope launched 19 July 2020 amidst the added challenge of the global COVID-19 pandemic. It will arrive in February 2021 to build a complete picture of the Martian atmosphere and study how Mars’ climate changes over time. This will give scientists deeper insight into ancient Mars and whether the planet could have once supported life. It will also help us understand how our own planet’s climate is changing, and what the consequences of those changes are.
Hope also demonstrates the promise and importance of international space exploration. The mission is managed by the United Arab Emirates, with participation from scientists and engineers at U.S. universities. Japan launched the spacecraft. Space exploration brings us all together, and when more nations participate and collaborate, everyone wins.
How Hope Works
Hope will build on MAVEN's work by studying Mars from a much higher orbit: 22,000 by 44,000 kilometers instead of 4,500 by 150 kilometers. (MAVEN is one of multiple Mars missions that have orbits optimal for relaying communications between Mars rovers on the surface and Earth.
From its high perch, Hope will study Mars’ upper atmosphere, watching traces of hydrogen and oxygen—remnants from Mars’ wetter days—leak into space. The spacecraft will also study how the planet’s upper and lower atmospheres interact with each other. A high-resolution digital camera will capture stunning pictures of the planet.
Hope’s primary science mission is scheduled to last for 2 years. The mission could be extended after that.
Hope - UAE's First Mars Mission How did Mars change to the cold, dry desert-world it is today? See how the UAE's first Mars mission, Hope, plans to explore the red planet.
How You Can Support Hope
Planetary Society co-founder Carl Sagan once said that when you’re in love, you want to tell the world. Space missions like Hope are dependent upon sustained public enthusiasm from people like you. You know your audience best; we've got tools to help.
Tell the World
- Spread the Facts Worth Sharing at the top of this article on social media
- Send this page to others using the short URL planetary.org/hope
- Share pretty pictures of Mars and Hope
- Find out why missions to Mars are so important
- Stay up to date on the Hope and other missions by signing up for The Downlink, our weekly newsletter
Ready to take your next steps as a space advocate? Become a member and find out how you can take action in your community and government.
Hope in Recent Articles, Newsletters, and Podcasts
Get a peek at the Martian moon and catch up on what the newest Mars explorer has been up to.
With 3 new missions safely at Mars, we’re ready for the next era of exploration and discovery.
Author of The Martian Andy Weir and the leader of the United Arab Emirates’ successful Hope Mars orbiter mission joined other Mars all-stars at Planetfest ’21.