A spacecraft from the ESCAPADE mission photographed Earth and the Moon collectively in seen mild and thermal infrared. The 2 views present a transparent distinction between the 2 our bodies.
Earth’s ambiance and oceans retain extra warmth, whereas the lunar floor cools rather more strongly.
These pictures from NASA’s ESCAPADE mission present Earth (left) and the Moon (proper).
The picture on the left exhibits the seen daylight mirrored by Earth and the Moon, whereas the infrared picture on the fitting reveals the vitality emitted by these celestial our bodies. White rings have been added to the thermal picture to point the precise dimension of Earth and the Moon.
Credit score: NASA/UCB-SSL/NAU-Radiant/Lucint
The pictures had been taken on July 3, 2026, whereas the spacecraft was 584,600 km from Earth. It was additionally 186,100 km from the Moon. This geometry makes our pure satellite tv for pc seem comparatively massive within the digital camera’s subject of view.
The Solar immediately illuminated solely about 8% of the seen face of each our bodies. Within the visible-light picture, Earth and the Moon subsequently seem as skinny crescents. This view depends on daylight mirrored by their surfaces and by Earth’s ambiance.
The thermal picture, in contrast, measures the vitality emitted as infrared radiation. The evening facet of Earth stays seen because of its personal warmth. Its obvious temperature ranges between 250 Okay and 280 Okay, or about -23 °C to +7 °C relying on the areas noticed.
The dimly lit face of the Moon drops to almost 100 Okay, or about -173 °C. Our satellite tv for pc has neither oceans nor a dense ambiance to retailer and redistribute vitality. Its floor subsequently loses warmth quickly when it passes into shadow.
The pictures had been obtained with the VIOS cameras, for Seen and Infrared Commentary System. These devices had been supplied by Northern Arizona College. Photographing Earth and the Moon, whose properties are already well-known, makes it attainable to confirm their operation earlier than arrival at Mars.
ESCAPADE consists of two spacecraft designed to review the interplay between the photo voltaic wind and the Martian surroundings. They’re scheduled to achieve Mars in September 2027 after an Earth gravity help deliberate for November 2026. Their cameras will notably seek for seen auroras and measure the thermal properties of the Martian floor and ambiance.
