Is there a clearer way of describing Newtonian physics or rocket basics to someone confused by how they work? 🚀

Joycjoint Chemicals in the cosmos Rockets don’t “press against the atmosphere” to create thrust. Thrust is a force created by the expulsion of exhaust.

Perhaps we can loop in some rocket engineers or physicists to explain further.

Here's a better processed version of that frame showing the green flash.

Three (Earth) years ago today Ingenuity took this picture of Perseverance on Mars from about 85 meters away

This is one of the first ever color pictures of Earth's horizon from space, taken as part of a 16mm movie film from 100 miles altitude on October 5, 1954. It shows an area of the Pacific just off the western coast of central Baja California. (Source: apollospace.com/first-color-ph…)

New Mastcam-Z panorama taken by the Perseverance rover during dusk on Sol 1030.

Full resolution: gigapan.com/gigapans/234523

Credit: NASA/JPL-Caltech/ASU/Simeon Schmauß

Joycjoint Low density—a few atoms per cubic cm—is very much a vacuum. It's more of a vacuum than anything that can be created on Earth. There is effectively no atmospheric pressure in the geocorona, despite its presence and gradient.

There is no 100% complete vacuum, even in space.

A couple of X-ray timelapses I helped process for the Chandra team ⤵️

On this day 1972 - Apollo 16 Deep Space EVA

Ken Mattingly becomes the 2nd person to perform a deep space EVA during the journey back to earth from the moon, assisted by Charlie Duke on the left who is standing up in the Command Module’s hatch

The purpose of the EVA was to…

Joycjoint Saturn 1B The density of atoms in Earth's geocorona, while not zero, is low enough to still be effectively a vacuum. esa.int/Science_Explor…

A view of Venus made from image data captured by JAXA's AKATSUKI spacecraft in ultraviolet and infrared wavelengths on April 25, 2016 from about 80,000 km away

Saturn's moons Prometheus (top) and Pan (lower left of center) orbiting Saturn inside the ring plane, imaged by NASA's Cassini spacecraft on April 25, 2008 #OTD . Saturn's sunlit side can be seen in the background at the bottom through the rings. 🪐

Three (Earth) years ago today Ingenuity took this picture of Perseverance on Mars from about 85 meters away

Here's what the Apollo 16 site looks like from lunar orbit. This picture was captured on December 3, 2011 from about 38.6 km/24 miles up by LRO. Original image scale is about 0.47 meters/pixel.

That's no sunspot—it's a SPACE STATION