Links to pages in this website are STABLE and won't break. Although, this site is not as flashy as others, the website structure is the most stable astronomy website anywhere on the web.Social and cognitive learning links to pages within this website from other external sites have worked since 2001 (that's "forever" in terms of the internet) while the content on the pages have continually updated.Social and cognitive learning pages are added to the structure for entirely new material and topics while "old" pages are updated, so links to the older pages will still work even as their content is updated.Social and cognitive learning if you know of another website that has been around since 2001 (or longer) with a stable structure that has enabled links from external sites to pages within the website to still work as content has been updated, please let me know.Social and cognitive learning

Pseudoscience vs. Science article. Borrowing from carl sagan's "the demon-haunted world", I take up the subject of ufos as alien spacecraft.Social and cognitive learning this article is not part of the regular textbook. Other documents on astronomy notes about fake science and news: " the seven warning signs of bogus science" and " fake or real?Social and cognitive learning how to self-check the news and get the facts" (from NPR's all tech considered: original link).

(greenhouse effect, carbon cycle, runaway refrigerator, runaway greenhouse, etc.) mars discussion now includes proofs for liquid water in past and sub-surface water ice.Social and cognitive learning the earth discussion now includes the role of plate tectonics in the carbon cycle, evidence for human contribution to the atmospheric carbon dioxide and to the observed global temperature rise.Social and cognitive learning there are links to

Of the regular textbook. Also, is a short "how I know" PDF document with embedded links explaining why I accept the conclusion that earth's climate is changing and that humans play a role—just one sheet of paper needed to print.Social and cognitive learning after a wet winter in 2016-17, the california water future article explains why water conservation is still needed.• solar system fluff. The basics of meteorites,

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(galaxy clusters and collisions and superclusters). Updates: fixed broken links to external websites and updated material about dark matter in galaxies, origins of galaxies, galaxy collisions & mergers, large scale structure (superclusters), supercomputer simulations of galaxy motions & evolution, imaging M87's supermassive black hole with the event horizon telescope, and the "steps to the hubble constant" page.Social and cognitive learning

Constant. Updates: fixed broken links to external websites and updated material about cosmic microwave background radiation from planck mission, observations of first galaxies, dark matter, temperature power spectrum (also added graph from 2018 final planck data release, BICEP2 discussion, dark energy, and tension with hubble constant measurements.Social and cognitive learning

Bakersfield night sky. A bimonthly (twice per month) look at the latest astronomy news and what's happening up in the sky that you can see without a telescope.Social and cognitive learning this is not in the hardcopy and not even on the astronomy notes site BUT it is a major part of my outreach to the world on astronomy topics that it deserves a link here on the astronomy notes homepage.Social and cognitive learning often, a recent astronomy result is discussed on the bakersfield night sky site before it makes it into the appropriate chapter in the astronomy notes site.Social and cognitive learning

Other schools. New page added about why it is better to WRITE your lecture notes instead of type them.• astronomy careers. A brief overview of a career in astronomy research.Social and cognitive learning it covers the likes and attitudes of research astronomers, need for formal writing ability, where astronomers work, and expected pay scale. Brief enough to fit on a single sheet of paper, back-to-back.Social and cognitive learning