Category: Space and flight

Posts about flying in atmospheres, or outside of them

Canada and the ‘Golden Dome’

Canada’s connection to US ballistic missile defence efforts goes back a long way and is interwoven with our shared history of continental air defence.

Now, Trump is proposing a ‘Golden Dome’ to supposedly make America safer from foreign threats, and Canada is part of the discussions.

Recently, the American Physical Society released a detailed free report: “Strategic Ballistic Missile Defense: Challenges to Defending the U.S.”

The basic weaknesses of the whole concept are simple to understand: it takes drastically more expense and hardware to (possibly) stop one missile than it does for a challenger to build one more missile. As a result, the technology is inherently likely to fuel arms races, as foreign challengers fear their deterrents will lose credibility.

Related:

See also my 2005 report: “Common Threats, Joint Responses: The Report of the 2005 North American Security Cooperation Assessment Student Tour“

Worms or moles

It is not hyperbole to make the statement [that] if humans ever reside on the Moon, they will have to live like ants, earthworms or moles. The same is true for all round celestial bodies without a significant atmosphere or magnetic field—Mars included. —Dr. James Logan, Former NASA Chief of Flight Medicine and Chief of Medical Operations at Johnson Space Center.

Weinersmith, Kelly and Zach. A City on Mars: Can we Settle Space, Should we Settle Space, and have we Really Thought this Through? Penguin Random House, 2023. p. 192 ([that] in Weinersmith and Weinersmith)

Mars as a refuge for humanity?

Consider the 2015 Newsweek article: “Star Wars’ Class Wars: Is Mars the Escape Hatch for the 1 Percent?” which claims “the red planet will likely only be for the rich, leaving the poor to suffer as earth’s environment collapses and conflict breaks out.” The only way you could believe this would be if you had no idea how thoroughly, incredibly, impossibly horrible Mars is. The average surface temperature is about -60°C. There’s no breathable air, but there are planetwide dust storms and a layer of toxic dust on the ground. Leaving a 2°C warmer Earth for Mars would be like leaving a messy room so you can live in a toxic waste dump.

The truth is that settling other worlds, in the sense of creating self-sustaining societies somewhere away from Earth, is not only quite unlikely anytime soon, it won’t deliver on the benefits touted by advocates. No vast riches, no new independent nations, no second home for humanity, not even a safety bunker for ultra elites.

…

Mars is nowhere near being a Plan B home for humanity anytime soon. Consider a worst-case climate scenario. The oceans have swollen ten meters higher, drowning New York City and Boston. Low-lying countries like Belgium and the Netherlands have been swallowed up whole. Heat waves make parts of the Southern Hemisphere uninhabitable as the planet is ravaged by floods, droughts, wildfires, and massive tropical cyclones. More than half of the world’s species die, coral reefs become bleached skeletons, freshwater sources from snowpack melt away or are fouled by rising seas, tropical diseases make their way into formerly temperate climates. Crops fail, people starve, and violence breaks out as over a billion climate refugees beat against the closed gates of the comparatively livable North.

That planet? Eden compared to Mars or the Moon. That Earth still has a breathable atmosphere, a magnetosphere to protect against radiation, and quite possibly still has McDonald’s breakfast. It’s not a world we would like to inhabit, but it is the one world in the solar system where you can run around naked for ten minutes and still be alive at the end.

Weinersmith, Kelly and Zach. A City on Mars: Can we Settle Space, Should we Settle Space, and have we Really Thought this Through? Penguin Random House, 2023. p. 2, 137-8

Related:

The nuclear razor’s edge

I listened to the audiobook of Annie Jacobson’s Nuclear War. Having followed the subject and read a lot about it over the years, it nonetheless had a lot of new information inside of a compellingly presented, plausible, and chlling story.

Our whole world can end in a couple of hours; live life accordingly.

A broad-ranging talk with James Burke

As part of promoting a new Connections series on Curiosity Stream launching on Nov. 9, I got the chance to interview historian of science and technology, science communicator, and series host James Burke:

The more interview-intensive part begins at 3:10.

Satellite to satellite espionage and warfare

One inescapable but confounding element of trying to understand politics, international relations, and history up to the present day is that we don’t have access to what governments are doing in secret. We will need to re-write the history of these times decades from now, if circumstances and freedom of information laws permit historians to learn about the skullduggery of this era.

One potentially important example is happening now in space. Satellites have become crucial to everything from time synchronization for high precision activities to navigation and communication. They also can’t really be hidden. Perhaps there are satellites with optical stealth that are hardly or never visible, but even top secret spy satellites of the conventional design can have their orbits determined by civilians with stopwatches and binoculars.

That is why we know that Russia, among others, has been experimenting with satellites that approach others and can potentially disrupt or destroy them, or monitor their activity. An article on China’s program includes the intriguing phrasing: “non-cooperative robotic rendezvous” between spacecraft. Russia’s Cosmos 2542 is known to have approached USA 245: an American spy satellite believed to be one of the largest things in space.

One can only speculate on how such capabilities are influencing world politics and the unfolding of events.

The JWST is in orbit

In what may be the rocket-launched science story of the decade, the James Webb Space Telescope launched from the Guiana Space Centre in Kourou, French Guiana early Christmas morning Toronto time with me and many other science nerds watching the feed with mingled excitement and fear.

The process from here is remarkable both in terms of orbital trajectory and spacecraft deployment. This Scott Manley video shows the unusual position in space the JWST will occupy and the engineering and science reasons for it. This animation shows the planned deployment sequence for the spacecraft, which had to be folded to be housed in an aerodynamic fairing to push up through the Earth’s atmosphere.