Estoy escuchando de fondo mientras curro en casa lleno de mocos el #tinyDesk de #amaia y me está gustando bastante la verdad.

https://www.youtube.com/watch?v=6tCjflXY9CM

Earthset with an iPhone
Video Credit: NASA, Reid Wiseman
Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)

Explanation: What does it mean for the Earth to set? Artemis II Commander Reid Wiseman gave us another spectacular view of Earth from their historic flyby of the Moon. Commander Wiseman's video, taken with an iPhone at 8x zoom, shows our entire planet gradually blocked from view by the Moon. On the Earth, the 24-hour planetary rotation causes the Sun to set below your horizon every night. However, on Artemis II the Earthset was caused not by the Moon’s rotation but by the spacecraft moving behind the Moon (at about 55 seconds in this video). Once rare, views of Earth are now taken many times a day from many spacecraft, including NASA’s SWOT (Surface Water and Ocean Topography) satellite tracking freshwater resources and USGS Landsat 8 and 9 satellites supporting water management for farmers, for example. Space agencies around our home planet now work together to provide unique and ever-improving views of our Earth.

https://apod.nasa.gov/apod/ap260422.html #apod

On this day in 2016, sister Voyager 1 turned off her Ultraviolet Spectrometer (UVS), saving 2.5 W.

The UVS determined the scattering properties of lower planetary atmospheres, the distribution of constituents w height (including the hydrogen corona), observed airglow & auroras, and to looked at rings in the UV.

The UVS was one of the few differences between V1 & V2: the gratings used to scatter light were slightly different between the two spacecraft. The V1 grating covered 53.5 to 170.2 nm, while V2's grating covered 51.3 to 168.0 nm.

Two very different modes were used for this instrument: one while looking directly at an object (emission lines), and an occultation mode while the Sun was passing through/behind the object (absorption lines). The occultation mode allowed data collection through increasing depths of the occulting body's atmosphere. To avoid having all the instruments on the arm pointed at the Sun, an offset mirror was used for the UVS in this mode.