The next Mars launch window is in late 2026. So why is this exploratory mission taking off now?

A NASA mission is set to launch twin spacecraft on a journey to Mars. The robotic orbiters could lift off atop Blue Origin’s New Glenn rocket as soon as Sunday.

​ A NASA mission is set to launch twin spacecraft on a journey to Mars. The robotic orbiters could lift off atop Blue Origin’s New Glenn rocket as soon as Sunday. Read More Breaking News, Latest News and Videos | CNN