57K views | Did you know that proton therapy can be used to treat a variety of conditions, including brain tumors, lung and chest tumors, prostate cancer, and more? To learn more about proton therapy at the first and most experienced proton therapy center in the Washington, D.C., metropolitan area, visit: https://bit.ly/3clftXc. | MedStar Georgetown University Hospital | Facebook

11K views · 152 reactions | Watch as the Russian proton rocket...

On January 8, 1973, the Soviet Union launched the Luna 21 mission to land a rover on the moon. Space History Archives👉 https://space-com.visitlink.me/MWQNq5 This was the second time that the Soviet Union put a rover on the moon,and it was the 13th successful lunar landing of the Luna program. Like the other Luna missions, Luna 21 was an uncrewed, robotic spacecraft. It launched on a Proton rocket and touched down in the Le Monnier crater one week later. About three hours after landing, it deplo