Jaguar Artis 3L0A0622 By Safi Kok

Hubble | James Webb 🔭

O progresso científico na sua forma mais cristalina

#Nasa #JamesWebbTelescope #HubbleTelescope #Science #Astronomy #TelescópioEspacial #Universo #Ciência #Astronomia #Universe

The color pink in the Universe

What wonderful World

Flight

My Favourite Curiosity Pictures from the Past Decade

The Mars Science Laboratory (MSL) aka Curiosity (above) landed on Mars at 10 (earth) years ago at the exact time of posting - 5:17 UTC on August 6th, 2012. Even before its landing I've been starry eyed over the mission, and the for almost three years I've been lucky enough to get to do science operations with the rover*. In honour of a decade of roving Gale Crater, here are some of my favourite pictures. (This will be a long post.)

*Standard disclaimer that nothing in this post or on this blog for that matter is at all associated with NASA or the CSA - opinions all my own!

I would be remiss to not start out with clouds - I LOVE this image - if you've ever seen me do a talk about Mars you've probably seen this picture. During the early part of the Mars year, clouds form in the twilight which are really high in the atmosphere and so can be illuminated even after the sun has gone below the horizon. These are called noctolucent clouds, and we also get them on earth! I also love this picture because it combines the two science teams - the environmental team and the geo team.

This is a panorama from Curiosity's landing site (Bradbury landing) and shows a fairly distant-looking Mount Sharp - the central peak of Gale Crater. It took MSL nearly two 9earth) years to reach the mountain, and since then we've been climbing it, travelling through the timeline of Gale as we move from older to younger sediments.

I love a blue sunset picture. This one is from fairly early on in the mission - less than 1000 sols (martian days) in (for reference - we're on sol 3554 now). The sunsets on Mars appear blue because of the scattering properties of dust in the atmosphere. Blue light is more effectively scattered forwards from the sun, but as the sun sinks and we look through more atmosphere, the blue light can spread out a bit.

This set of images was taken during the global dust storm of 2018 (Mars year 35), the one that spelled the end of Opportunity. Luckily, Curiosity uses nuclear power, not solar, and was able to weather the storm. It's so cool to watch the crater rim in the distance disappear, and the closer ground as well. The rover got well and truly socked in.

The final image I'm going to share is this delicate little "flower". When I first saw the MAHLI image (MAHLI = Mars Hand Lens Imager) I gasped out loud. I love cool looking rocks! This one is only a few centimetres tall but I love how much it really does look like a bit of coral or a flower (it isn't - Curiosity hasn't found plants on Mars).

Geometries

The Braided Paraná

An astronaut onboard the International Space Station (ISS) snapped this photograph of a portion of the Paraná River, the second longest river in South America. It flows mostly northeast to southwest for approximately 4,880 kilometers (3,030 miles), passing through Brazil, Paraguay, and Argentina and making part of the Argentina–Paraguay border.

This image captures some of the interlocking, braided patterns that are common along the Paraná River system. Sediment that eroded upstream from riverbanks in Brazil was carried downriver and deposited and piled up into islands—such as Isla Apipé (Argentina). The sediments also make braid bars, which are smaller, rhomboid-shaped landforms created by the interweaving of water and land as the river level rises and falls over time.

This labyrinth of braided channels also provides routes for small boats and ships, allowing for the transport of goods to inland South America—at least as far upstream as the Yacyretá Dam. Built to generate hydroelectric power, the dam now separates the upper Paraná River from the braid bars.

Farmers cultivate crops such as coffee, corn, and cotton in fields adjacent to the Paraná River floodplain. These crops, among others, have been affected by ongoing drought conditions that began in the region in 2020 and have slowed the transport of goods decrease in water levels.

Astronaut photograph ISS065-E-163199 was acquired on July 9, 2021, with a Nikon D5 digital camera using a focal length of 200 millimeters. It is provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center. The image was taken by a member of the Expedition 65 crew. The image has been cropped and enhanced to improve contrast, and lens artifacts have been removed. The International Space Station Program supports the laboratory as part of the ISS National Lab to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by Amber Turner, Jacobs, JETS Contract at NASA-JSC.

Happy 2nd gotcha day to our Big Three lotes, Noicd, Bibz and Meatball!! We love you (and your children), goofuses!

Ecosocialist praxis