We are witnessing in real time the fact that stellar atmospheric dynamics are much more complex than anyone admits to. The observed eleven year solar cycle is...

"Cockpit Colin" writes: "If the gravity of the moon can, from a quarter of a million km away, be strong enough to influence...

I'm reading this book by Arthur C. Clarke. It involves a spaceship of sorts, which is a cylinder that rotates about its long axis. The idea is that a person...

Over on alt.planets.mars, where the 'unorthodox' interpreters of the MER photos set up shop, there are a couple interesting observations. I would love it if I...

I'm looking at the sol 107 panoramic images from Opportunity. Check out these two...

Has there or is there any infrasound microphones on Mars? If not, I think there should be. Infrasound is no proplem for the low pressure atmosphere and you can...

http://www.physorg.com/news158.html An advanced high-speed inlet for propulsion systems to power air transport vehicles at supersonic speeds has completed...

I am gearing up to teach Earth Science this Fall in the Bronx, NYC. I am currently looking for online resources to include in the classroom. Does anyone know...

It might be just me but I find the first pictures released rather dull and hard to interpret... Can / should we expect something more "sexy" in the future...

(lower right) http://marsrovers.jpl.nasa.gov/gallery/press/opportunity/20040225a/xpe_First_Opp_RAT-B032R1.jpg http://marsrovers.jpl.nasa.gov/

Does anyone know how the Spirit and Opportunity mars rovers are communication with the earth receivers, protocol, frequency? Is encryption used? Thanks.

It is possible information to the leave a black hole. Entanglement is a feature of quantum mechanics that allows particles to share a much closer relationship...

This message is going to make me sound like an absolute loon, but here goes anyway. I live in upstate NY about 60 miles west of Albany and about 1 mile south...

I have a few questions about the greenhouse effect 1. What is the percentage of the atmosphere is water vapor? 2. How potent a greenhouse gas is water...

Calling all Martian meteorology experts out there! Given that we have seen sometimes quite prominent clouds over the Martian polar regions, I wonder if it...

Recent photos from the rover have shown a shallow crater nicknamed 'sleepy hollow' not far from Spirit's landing site. In fact there appear to be several such...

I was wondering if anybody has some numbers for average martian insolation, say on the equator. I found some data suggesting that insolation measurements at...

Announcement, for your information, browse and act as you see fit. Sterling-Bond announced proposal for an independent commercial space venture. This UK...

I have trivial question Our earth is moving around sun, and simultaneously also rotating with galaxy, Considering only the galaxy rotating factor , also sun ...

I just finished reading Brian Greene's "The Elegant Universe". The section in chapter 15 titled "What are Space and Time, Really, and can we do without...