It’s not easy to contradict Congress, but its legislation to bar the use of the Russian RD-180 rocket engine from launching U.S. security payloads, as Robert Bunn so eloquently points out, is truly a classic example of shooting oneself in the foot. The relatively minuscule economic benefit Russia gains from the sale of these engines is dwarfed by the loss their eradication created in operational capability of U.S. security systems.
The supermassive black hole is 40 million times as massive as the sun and powers a quasar that existed 700 million years after the Big Bang.
The asteroid zoomed by Earth at a perfectly safe distance of around 1.8 million miles (2.9 kilometers).
Images show surprise changes to the spacecraft as it interacted with the atmosphere.
