Greenwich Royal Observatory has an online beginners course.
Greenwich Royal Observatory has an online beginners course.
Let's not forget the basics:
Clearest textbook I have seen to date and it's free for the downloading.
This one, or Thompson's original version, can be had at little cost in used book shops:
As an incorrigible tilter at windmills and kicker of sacred cows I am compelled to reccommend this text. On the other hand, it probably should be read in conjunction with a standard calculus textbook, many good ones of which are available from vendors of used books.
I definitely appreciate the lists posted recently on the forum on web resources.
For newbies just getting back into astronomy/related sciences and browsing online, does anyone have any suggestions on criteria these web resources should meet? How could someone know what is reliable from what is edited/spinned?
Amazing thread, this will keep me busy for months. Thanks very much.
I received this from the moderator of this forum, not a site, but both PDF-files are very to the point, with explanations accompanied by formulas to prove things and let you find out yourselves.
"However, this paper, by Davis and Lineweaver, provides a good, succinct account of some popular misconceptions of modern cosmology.
Davis and Lineweaver have also written a less technical account. It was published in the magazine Scientific American, in March 2005. However, you can get a (PDF) copy from Charles Lineweaver's webpage - click on the link to it (it's at the bottom of the webpage).
If you don't understand anything in either, please just ask.
I think that you should first understand the basics of the "Big Bang" theory, before trying to understand how Dark Energy fits into the concordance model
Spaceman Spiff recently posted an article describing Caltech cosmologist Sean Carroll's Preposterous Universe site and its Cosmology Primer and FAQ pages.
Current FAQ questions:
===What is the universe expanding into?
Are distant galaxies moving faster than the speed of light? Wouldn't that violate relativity?
Does the universe have a center?
Could we detect the expansion of the universe by trying to measure the expansion of the solar system?
Is the universe finite or infinite? Will it recollapse or expand forever?
Is space flat or curved? I've heard both.
Is energy conserved in an expanding universe?
What is the difference between dark matter and dark energy?
Will we ever be able to detect dark matter or dark energy directly?
Isn't "dark energy" just like the older concept of the "ether"?
How do you know that dark matter isn't just ordinary matter that we can't see?
Could the inferred existence of dark matter and dark energy be due to a modified behavior of gravity?
Is inflation testable?
What came before the Big Bang?
Is our universe the only one, or are there others?
Just thought I'd add a link here to the Lineweaver "misconceptions" article mentioned above:
Scientific American: Misconceptions about the Big Bang
Version from Charles Lineweaver's site (PDF half-megabyte)Baffled by the expansion of the universe? You're not alone. Even astronomers frequently get it wrong
Charles H Lineweaver publications
Last edited by 01101001; 2008-Dec-05 at 01:33 AM.
This has become a daily favorite of mine:
The Lunar Photo of the Day.
(I didn't see this one listed, yet.)
Last edited by Swift; 2010-Jun-19 at 03:15 AM. Reason: Updated with current link
Is SETI at home (?) still going, or is that ATM.
I didn't see it listed so it may not fit the criteria.
I hope you'll consider the two sites in my signature line. Science news, daily sky charts, podcasts featuring interviews with scientists, blogs, great community ...
Come on over!
I suspect this will be useful next time someone asks about how the moon moves, and looks: Lunar Phase Simulator (Flash animation)
A product of the Nebraska Astronomy Applet Project, NAAP. The project appears to be ongoing, with more animations and exercise modules to come.
Some current animations:
- Solar System Models
- Basic Motions and Seasons
- The Rotating Sky
- Motions of the Sun
- Planetary Orbit Simulator
- Lunar Phase Simulator
- Filtered Light Simulator
- Blackbody Simulator
- Hydrogen Atom Simulator
- Eclipsing Binary Simulator
Why didn't someone tell me this was available on the Web?
Cliffs Notes: Astronomy
Need help with your astronomy homework and tests? We have lots of articles for you. Just browse the list of topics below, or search for something specific within our astronomy articles.
- A Brief History of Astronomy
- The Science of Astronomy
- Observing the Sky
- The Solar System
- Earth and its Moon
- Other Planets of the Solar System
- The Sun, a Representative Star
- Observational Properties of Stars
- The Hertzsprung‐Russell Diagram
- The Structure of Stars
- Formation and Evolution of Stars
- Final End States of Stars
- The Milky Way Galaxy
- The Universe
- Life in the Universe
Seen on Planetary Society Weblog: Solar systems in motion:
Solar Systems Visualizer (Flash)
Zoom in and out on our system. Investigate a particular planet's system of moons. Do the same for other systems (with less detail, of course).
It's part of the University of Maryland Astronomy Workshop, itself worth a visit.
Explore the Possibilities
Solar System Calculators
Solar System Viewers
Working With Orbits
Index of all Tools
I took a look at your site and recommend it to my visitors. I agree with you on the importance of becoming valuable in many different areas. I believe that it sustains any entrepreneur during challenges that inevitably occur.
Pinemarten inquired about SETI@home but didn't post a link.
SETI@home is indeed still ongoing; it is now part of the BOINC Project, which includes several distributed computing projects, SETI@home being only one of them.
The BOINC main page is here:
The page listing BOINC projects is here:
Martindale's Calculators On-Line Center, Physics, Astrophysics, Astronomy and Astrobiology
Martindale's site seems to be operated by an individual -- Jim Martindale -- who likes providing helpful references. One of many sections listed on the front page:Calculators, Applets, Spreadsheets,
and where Applicable includes: Courses, Manuals,
Handbooks, Simulations, Animations, Videos, etc.
Currently the Calculators On-Line Center contains
over "23,785" Calculators & Spreadsheets,
over "3,710" Courses, Lectures, Manuals, Handbooks,
& "1,000's" of Movies, Videos, Simulations & Animations
Geeky goodness. Mmm.Science Overview
Periodic Tables & Physics Databases
Lab Manuals, Guidelines, MSDS
Climatology, Meteorology, Weather
Did someone say "astronomy"?Physics Center
Examples: Fundamentals, 1st & 2nd Year
Accelerators, Chaos, Electromagnetics
Fields, Quantum Field Theory, Quantum Groups,
...Quantum Condensed Matter Field Theory, etc.
Magnetics, Neutrons, Phy. of Music
Atomic, Molecular & Optical, Geophysics
High Energy, Mathematical, Nuclear, Plasma
Solid State, Quantum Mechanics, Relativity
Sports Physics, Statistical Mechanics
Thermodynamics, Physics Databases
& Astrobiology Center
Examples: Picture of the Day, 1st-4th Year
Asteroids/Comets, Earth, Extrasolar Planets
Space Missions, Stars, Nebulae & Galaxies
Space Weather, Solar Activity, Catalogues,
Telescopes, Observatories & HST, Sky Charts
www.liftport.com has a rather good FAQ and a very extensive archive of forum about the space elevator and related topics. Some of the details are likely wrong, but that likely is true of all sources of information.
www.spacesolarpower.wordpress.com has a mostly correct forum about solar power satellites and related topics. Neil
Is there a post like this for podcasts? Just a thought, as my Ipod is brimming with loads of completely free content, both audio and video, related to space, astronomy and the sciences.
Not sure if this has been mentioned:
Wayne Hu's excellent website on the Cosmic Microwave Background
Fraser Cain, owner (with Phil Plait, the Bad Astronomer) of this website, also owns Universe Today. This site has an excellent Guide to Space section; however, it's best to use this by entering a key word (or phrase) into the search box, making sure "Universe Today Search" is selected.
The videos of Richard Feynman's lectures on quantum electrodynamics have been referenced a few times recently. These are pretty non-technical and a good introduction to how quantum theory explains the behavior of light.
Well, if I might "plug" my own website here, I have 2 magnitude calculators:
http://www.1728.org/magntudj.htm (this is a more advanced magnitude calculator)
and two calculators for Kepler's Third Law:
http://www.1728.org/kepler3a.htm (the more advanced calculator)
Last edited by wolf1728; 2011-Jun-13 at 10:28 PM. Reason: 1728.com stolen from me in May 2011. I have to use 1728.org now.
I've listened to a great set of lectures from Ohio State University available as a podcast or mp3:
Astronomy 141 - Life in the Universe
Astronomy 161 - An Introduction to Solar System Astronomy
Astronomy 162 - Introduction to Stars, Galaxies, & the Universe
I also live the Slacker Astronomy Podcast! Awesome!
This looong list will have me busy for a while!
For relativistic physics there is the modern relativity site
curious if equations can be done
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