Elon Musk will likely have a Super Heavy Starship presentation in July, 2019. It will be after the first successful untethered hop tests for the Starhopper.
Might get pushed to next month. Starhopper flight first. Waiting on engine repair.
— Elon Musk (@elonmusk) June 17, 2019
NASA Green Fuel Used on Satellite Launching on Falcon Heavy
On June 24 on a SpaceX Falcon Heavy rocket will fly NASA’s Green Propellant Infusion Mission (GPIM). GPIM will test out a low-toxicity propellant in space for the first time. The clean propellant, a hydroxyl ammonium nitrate fuel/oxidizer mix called AF-M315E, will be used instead of the highly toxic hydrazine fuel.
SOURCES- Elon Musk Twitter, NASA
Written By Brian Wang, Nextbigfuture.com