NASA says its scientists have cracked a mystery on Mars, but space enthusiasts will have to wait until Monday for the big reveal.

The "major science finding," as NASA calls it, will be unveiled Monday at 11:30 a.m. ET, in a live online broadcast from the space agency’s headquarters in Washington, D.C.

And while few details have been revealed, armchair astronomers in search of clues were quick to scrutinize NASA’s press release.

Scientists slated to speak at Monday’s news conference include Alfred McEwen, the principal investigator for the HiRISE camera on the Mars Reconnaissance Orbiter; Mary Beth Wilhelm, who has studied the possibility that Mars was once habitable; and Lujendra Ojha, whose work explores Martian rock formations that seem to be carved from water.

Combining those three ideas – photography, water and ancient alien life – the Twitterverse was shot into a dizzying orbit of speculation.

And more than a few theories seemed to test the limits of science.

The NASA announcement comes the morning after the highly anticipated “supermoon” eclipse, which saw an orange-red harvest moon pass through the Earth’s shadow. It was the first instance of the rare celestial phenomenon since 1982, and it won't be seen again until 2033.