What do you get when you combine one of the world’s richest men with arguably the world’s smartest? No, this isn’t a joke – there’s a major announcement coming today from Russian billionaire Yuri Milner and Professor Stephen Hawking.

Details are few and far between at the moment, but what we do know is that the two will reveal a new space exploration project called “Starshot” today, Tuesday, April 12, at 12 p.m. EST (5 p.m. BST) at the One World Observatory in New York City.

The event will be live-streamed online at that time, which you will be able to watch below when the event begins.

So, what’s it all about? Well, we’re not really sure at the moment. This is the latest Breakthrough Prize from Milner and Hawking, with a previous project from the two being the groundbreaking $100 million Breakthrough Listen campaign, one of the most extensive searches for intelligent extraterrestrial life to date.

The name “Starshot” might imply that this is some sort of proposal to develop a vehicle to travel beyond the Solar System, or perhaps it is a new observation program to observe other stars aside from our own.

Whatever it turns out to be, make sure you tune in later today to find out.