I think my favorite is “SpaceX SAOCOM-1B launch with moon on a dark blue sky”. That is the one that I have set as my wallpaper. The two I included at the top of this post are close runners up. Visit the links above to see the full size wallpapers.
You might also want to visit the SpaceX Flickr site. There are larger format photos there. I really like the one shown above. I think it will become one of the wallpapers on my Mac.
I discovered these cool wallpapers on the iDownload Blog. If you visit their site they offer many different iPhone wallpapers.
The idea of a nuclear rocket engine was developed in the 1960s for NASA. The research was led by Werner von Braun and successfully tested in Nevada.
What is a nuclear thermal rocket?
A conventional chemical rocket carries combustible chemicals which are ignited, then the resulting gases flow out of a nozzle propelling the vehicle. In a nuclear rocket, a small marble size chunk of Uranium fuel undergoes fission. This energy released heats hydrogen to very high temperatures (nearly 2500 C). The hydrogen is then expelled from the vehicle in a nozzle like on chemical rockets. The difference is that nuclear propulsion is two to three times as efficient. Tests were carried out starting in 1955 that have proven that this technique will work. Testing was discontinued in 1973.
Where are we Now?
The original design required highly-enriched uranium. Current designs will most likely rely on low-enriched uranium. This would make nuclear propulsion systems safer to work with. On May 22, 2019, the US Congress approved $125 million to fund new nuclear thermal propulsion development.
(See my other Space and Propulsion related posts) – The idea of a ‘sailing on light’ with a Solar Sail has been around for a while. A test flight of LightSail 1 (formerly LightSail-A) was launched on May 20, 2015. While the mission had problems, the LightSail 1 flight was considered a success.
The larger LinghtSail 2 is scheduled to launch June 24, 2019, aboard a SpaceX Falcon Heavy rocket.
Product Announcements– Xeric Design of Incline Village, Nevada has launched a beautiful new cloud image service for EarthDesk Data subscribers. The cloud image is now precisely geo-located and parallax-corrected, contains data from up to 23 satellites, and includes polar coverage. We have worked with the Space Science and Engineering Center’s RealEarth project at the University of Wisconsin, Madison to bring this high-quality data feed to EarthDesk. Previously, only six satellites were used and the data did not extend to the poles.
EarthDesk replaces your static desktop with an image of the Earth showing current sun, moon and city illumination, as well as near real-time cloud coverage. The software allows users to purchase an optional data subscription that offers the new precision clouds with 16 times more detail than the standard cloud layer. In addition, this service displays real-time data including worldwide earthquakes, named storms (typhoons, hurricanes, etc.) and the position of the International Space Station.
The software operates silently in the background, keeping your desktop updated while you work. Unlike a screen saver, which only appears when your system is idle, EarthDesk’s dynamic desktop is continuously displayed as your desktop background (and optionally as a screen saver on the Mac version).
System Requirements: Mac OS X 10.10 or later.
Pricing and Availability:
Single user copies may be purchased for $24.99 (USD). Upgrades are available for $12.99 for licensed users of versions 5 and 6. A data subscription adds precision clouds, earthquakes, named storms and tracking of the International Space Station starting at $11.99 per year. Bundles that include EarthDesk and a discounted data subscription are available. For more details, please refer to our website.
(See my other posts on Robots) – Today’s Cygnus cargo flight with 7,600 pounds of science, supplies & cargo for the ISS includes a pair of new robots. These will replace the current SPHERES robots on the International Space Station (ISS). The Astrobee robots have been developed by the Intelligent Robotics Group at the NASA Ames Research Center.
The new Astrobee robots are autonomous cubes designed to be flown around the ISS. The first pair of Astrobee robots are named Honey and Bumble. A third named Queen is scheduled to fly to the ISS later this year. These are very modular robots with hardware and software designed for a wide range of tasks and experiments.
The robots are intended to fly around the ISS autonomously, perform experiments, and take video. While they will generally be operated by humans from the ground, they will occasionally operate without any supervision.
Each Astrobee robot is about 12 inches (30 cm) square. They will use pressurized air from 12 different nozzles to propel themselves around the ISS. They can rotate in any direction and have no need to refuel as air is compressed and used from the ISS atmosphere.
The Astrobees are based on ROS and are equipped with six cameras, sensors, and enough computing power to allow them to operate autonomously. They can be fitted with modular payloads in their three different payload bays for a variety of experiments. Later this year a small arm will become available for manipulating objects and grabbing hold for maintaining their position. The robots will be able to undock, redock and perch within the ISS independently of the crew.
The robots should complete their checkout before the end of April. After that, they will map and be calibrated for the ISS modules. Final commissioning of the entire Astrobee system should be complete before the end of the year.
(See my other Space relate articles) – I came across the site “DESELLEMODELS” today and wanted to share it. Arco Hollestelle and Parthenis Deslis have created the site with paper models they have created of spacecraft. At present, they only have five, but it is a “work in progress” site. If you are interested in space and have some free time and a steady hand, you might want to check this website out.
Why is DARPA investing in a propulsion technology that is generally considered impossible? In part because the test results have not yet been definitive that the EM Drive is impossible. There is also concern that a technology that the Chinese claim to have made progress with cannot be ignored.
It will be interesting to see what new announcements will appear regarding the EM Drive.