SpaceX is really kicking things into high-gear with its Starlink network. The creation of this satellite constellation is central to Elon Musk’s vision of providing high-bandwidth internet access to a global market. Deployment began in earnest back in May with the launch of the first sixty Starlink satellites, with plans to launch an additional 1,584 by 2024 and 2,200 by 2027.
Until now, SpaceX’s long-term goal was to create a constellation of 12,000 satellites at altitudes ranging from 328 km to 580 km (200 to 360 mi) – based on what the FCC has approved so far. But according to recent filings with the International Telecommunication Union (ITU), SpaceX intends to send an additional 30,000 Starlink satellites to Low Earth Orbit (LEO) in the coming years.
Continue reading “SpaceX Files a Request to Launch Another 30,000 Satellites for Starlink, on Top of the 12,000 They’re Already Planning to Launch”
Quasars are some of the brightest objects in the Universe. The brightest ones are so luminous they outshine a trillion stars. But why? And what does their brightness tell us about the galaxies that host them?
To try to answer that question, a group of astronomers took another look at 28 of the brightest and nearest quasars. But to understand their work, we have to back track a little, starting with supermassive black holes.
Continue reading “Some Quasars Shine With the Light of Over a Trillion Stars”
Fraser Cain (universetoday.com / @fcain)
Allen Versfeld (https://www.urban-astronomer.com/ / @uastronomer)
Dr. Morgan Rehnberg (MorganRehnberg.com / @MorganRehnberg & ChartYourWorld.org)
Moiya McTier (https://www.moiyamctier.com/ / @GoAstroMo)
Jeff Kargel is a Senior Scientist at the Planetary Science Institute in Tucson, Arizona. He is a geologist, a glaciologist, and a planetary scientist. Climate change is a major thread, and that is what he is here today to talk about.
Continue reading “Weekly Space Hangout: October 16, 2019 – Jeffrey Kargel Talks Climate Change on Earth and Beyond”
When a NASA engineer announces a new and revolutionary engine that could take us to the stars, it’s easy to get excited. But the demons are in the details, and when you look at the actual article things look far less promising.
Continue reading “NASA Engineer Has A Great Idea for a High-Speed Spacedrive. Too Bad it Violates the Laws of Physics”
In order to be considered habitable, a planet needs to have liquid water. Cells, the smallest unit of life, need water to carry out their functions. For liquid water to exist, the temperature of the planet needs to be right. But how about the size of the planet?
Without sufficient mass a planet won’t have enough gravity to hold onto its water. A new study tries to understand how size affects the ability of a planet to hold onto its water, and as a result, its habitability.
Continue reading “Planet Sizes Matter for Habitability Too.”
There is no doubt that one of the hallmarks of the modern space age is the way it is becoming increasingly democratic. In addition to more space agencies entering the fray, private aerospace companies are contributing like never before. It is no surprise then that there are innovators and entrepreneurs that want to increase public access and participation in space exploration.
This is what UK startup Spacebit and its founder, Pavlo Tanasyuk, hope to accomplish with their decentralized aerospace company. Central to their vision is the Walking Rover, a four-legged robotic explorer that they plan to deploy to the lunar surface in the coming years. This rover will represent a number of firsts for space exploration, which includes being the first commercial lunar mission sent by the UK.
Continue reading “Robotic Spiders to Explore the Moon? Yes, Please!”
NASA and the DLR are making some progress with the Mole. The Mole has been stuck for months now, and NASA/DLR have been working to get it unstuck. After removing the mole’s housing to get a better look at it with InSight’s cameras, the team came up with a plan.
Continue reading “It Looks Like it’s Working! NASA InSight’s Mole is Making Progress Again Thanks to the Arm Scoop Hack”
Currently, commercial air travel accounts for 4 to 9% of the anthropogenic greenhouse gases that contribute to climate change. What’s worse, airplane emissions are on the rise thanks to rising populations and the increasingly globalized nature of our economy. Hence why NASA has been pursuing the development of electric aircraft these past few decades.
Much like reusable spacecraft and infrastructure, electric aircraft are part of NASA’s pursuit to make aerospace cheaper, more efficient and less harmful to the environment. Their efforts bore fruit in the form of the X-57 Maxwell – the first all-electric experimental aircraft – which was recently delivered to the NASA Armstrong Flight Research Center (AFRC) in Edwards, California.
Continue reading “NASA Has a New, All-Electric Airplane”
From some viewpoints, Mars is kind of like a skeleton of Earth. We can see that it had volcanoes, oceans, and rivers, but the volcanoes no longer fume and the water is all gone. A new image from the ESA’s Mars Express drives the point home.
Continue reading “This Dried Up Riverbed Shows that Water Once Flowed on the Surface of Mars”