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#satellites

18 posts18 participants0 posts today
Public
Nonilex

#kleptocracy & #corruption on full display:

Exclusive: #SpaceX, #ULA to clinch multibillion-dollar #Pentagon launch contract

#ElonMusk's SpaceX & United Launch Alliance are expected to each win a #US #SpaceForce rocket launch contract on Friday worth billions of dollars over the next several years to send some of the Pentagon's most sensitive #satellites into #space, acc/to 2 people familiar w/the procurement decision.

#law #Trump #broligarchy #plutocracy #USpol
reuters.com/business/aerospace

Public
Space Environmentalism

"The ideal of a dark and quiet sky is one many astronomers fight to protect. ... Preservation of the night sky across the electromagnetic spectrum is an extension of the stewardship of a human environment that now goes beyond our planet and reaches toward the cosmic ocean. It is also key to the future of astronomical discoveries."

pubs.aip.org/physicstoday/onli

#Astronomy#RadioAstronomy#LightPollution
Public
Space Environmentalism

Proliferating #SpaceDebris threatens environmental monitoring satellites.

"About 70% to 80% of all the [#climate and environment] information that we get are from #satellites. If those satellites in orbit are in danger, our ability to predict climate changes in the future […] is certainly under threat."

dw.com/en/space-junk-damaging-

A spider-like space vehicle extends four arms towards a floating piece of space junk above Earth
Deutsche Welle · Space junk damaging satellites: How do we remove it?By Matthew Ward Agius
#ClimateChange#RemoteSensing#SpaceEnvironment
Public
Cosmic Log

Amazon sets a date for milestone Kuiper satellite launch
Amazon and United Launch Alliance have set April 9 as the date for the first launch of full-scale satellites for Amazon’s Project Kuiper broadband internet network.

ULA said the three-hour window for the Atlas V rocket’s liftoff from Cape Canaveral Space F
cosmiclog.com/2025/04/02/amazo
#GeekWire #Amazon #Broadband #ProjectKuiper #Satellites #Space #UnitedLaunchAlliance

Delivery of Amazon Project Kuiper payload to Florida launch facility
Cosmic Log · Amazon sets a date for milestone Kuiper satellite launchAmazon and United Launch Alliance have set April 9 as the date for the first launch of full-scale satellites for Amazon’s Project Kuiper broadband internet network. ULA said the three-hour window f…
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🇨🇦 Michael Porter 🇨🇦

Mastodon! I'm delivering a talk to a couple of grade 9 classes in a month on the use of space (mainly satellites, but probes to other planets, comets, etc., will be included).

How does your work benefit from satellites?

I'm thinking of a direct use of the data, as opposed to stuff like “internet access” or “my bank relies on satellites to transfer my grant money from one account to another” 😄

Anecdotes, rants, personal stories are all fair game 😊
(To the inevitable suggestion that I just Google this, yes, I can, and have, but I want the human element - I want to be able to say "someone I ‘know’ uses satellites for their job, and this is what they like about the tech”)

Hashtag suggestions are welcome.
(Also - question: Does Mastodon discriminate hashtags with different capitalization? Are #Astronomy and #astronomy functionally different? We *really* need some kind of ISO standard 😉)

#Archaeology #Physics #SolarActivity #Geology #SevereWeather #Climate #ClimateChange
#Satellite #Satellites #Agriculture #oceanography

Continued thread
Public
Matteo Ceriotti

#ESA published this image with a documentary-film to show the current #debris and active #satellites.

"The colour-coded representation of debris in the image shows the number of objects of various sizes as well as active satellites"

It is important to underline that while number of points is accurate, the overall *density* that appears in the image is not, because the dots are pixels, which are not-to-scale to the actual objects (much smaller).

esa.int/Space_Safety/Space_Deb

[image credit: ESA]

The colour-coded representation of debris in the image shows the number of objects of various sizes as well as active satellites that are modelled to be circling Earth in August 2024.
Public
Dr. John Barentine FRAS

While this isn’t the biggest planned large satellite constellation, it could be part of 'death by a thousand paper cuts' outcome for #astronomy if every country decides it needs its own. And the current international space policy framework doesn't account for the so-called 'aggregate' effects caused by many such small constellations.

reuters.com/business/media-tel

#Space#Satellites#SpacePolicy
Public
Space Environmentalism

"With over 34,000 large debris pieces in orbit and millions of smaller fragments, the threat of collisions and the #KesslerSyndrome looms large. International cooperation, stringent regulations, and technological solutions are proposed to address the crisis, emphasizing the need for a comprehensive global framework to ensure #SpaceSustainability for future generations."

intpolicydigest.org/the-platfo

International Policy DigestSpace has Become a Trash Dump and That's a ProblemAll those decommissioned satellites and other space junk is becoming a problem.
#Space#Satellites#SpaceDebris
Public
Warren Currie 🦠🦐

Weekend #Plankton #Factoid 🦠🦐
Autotrophs are organisms which use pigments for photosynthesis by absorbing light at specific wavelengths. The dominant chlorophyll-a absorbs #light in the violet-blue (430nm) and red (660nm) wavelengths, but not green, which is why #algae is green. Phycocyanin, an accessory #pigment in #cyanobacteria, absorbs in those green wavelengths, so is blue in colour. This is why we can determine algae types from space.
scitechdaily.com/new-research-
#Science #satellites #oceans

image/jpeg a graph of pigments in algae showing absorbance of light by wavelength grom 440 (violet) to 700 nm (red). Pigments shown are chlorophyll a, chlorophyll b, chlorophyll Concentration, carotenoids, phycocyanin, phycoerythrin. Each absorb light at different wavelengths at their peaks.
image/jpeg a microscope image of a ball with tiny green dots filled with other bright green balls against a black background. Volvox Frank Fox CC-BY-SA 3.0.
image/jpeg a microscope image of a filament of cells that are slightly bluish-green coloured. Anabaena sphaerica CC-BY-SA 3.0.
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