- #421
ISamson
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Copernicus45 said:Can we see the Halley's Comet in our near future?
Probably.
In what country? Australia, Perth?
I don't know. Look it up.
Copernicus45 said:Can we see the Halley's Comet in our near future?
No. It won't be back again until 2061. See the Wiki article on Halley's Comet for more info.Copernicus45 said:Can we see the Halley's Comet in our near future?
Comets, if they are visible at all, are always visible from more than half of Earth‘s surface, often from nearly everywhere on Earth (if the comet is not too far away from the ecliptic).Ivan Samsonov said:Probably.
In what country? Australia, Perth?
I don't know. Look it up.
Please don’t post off-topic questions here. Changing electric charges would often make quantum field theory inconsistent.Copernicus45 said:Do you think another existing universe could have a different structure for nature from our structure?
For example instead of the one proton equalling the electron, it would have two electrons or more equalling a single proton.
Is it even possible to imagine?
The competition seems to be noticing, everyone is using SpaceX as "The Benchmark" to beat, (or at least compete with). Come to think of it, I could have titled the thread "SpaceX and stuff".mfb said:SpaceX is rapidly increasing its market share,
True, I was actually going to just post the home page of NTRS https://ntrs.nasa.gov/search.jsp as a useful collection of reports, data etc. but I couldn't resist linking the Solar Physics page as a sort of "hook" to get folks to look around the site.Stavros Kiri said:There is also a more specialized (but not limited to only) thread:
References and links to Solar Physics is of course (IMO) part of this more general thread too. Sun is both 'space' and 'stuff' ...1oldman2 said:True, I was actually going to just post the home page of NTRS https://ntrs.nasa.gov/search.jsp as a useful collection of reports, data etc. but I couldn't resist linking the Solar Physics page as a sort of "hook" to get folks to look around the site.
We know by measurement that the Moon is very slowly becoming more distant from Earth, a few centimeters a year.Copernicus45 said:Is the moon orbital around the Earth the same always?
Would the Sun's gravitational attraction might affect the moon's orbital when it is between Earth and the Sun.
Please open new threads for questions like these.jayzun said:The reason I made an account is to ask about the effect of gravity from an extra planet hiding behnd the sun. I think that if this was the case we would see much great impacts¿ say like the tides. Would they not be extremely high and low? Nonstop quakes that would be felt across the world?
https://www.jpl.nasa.gov/news/news.php?feature=6983A small, recently discovered asteroid -- or perhaps a comet -- appears to have originated from outside the solar system, coming from somewhere else in our galaxy. If so, it would be the first "interstellar object" to be observed and confirmed by astronomers.
This unusual object - for now designated A/2017 U1 - is less than a quarter-mile (400 meters) in diameter and is moving remarkably fast.
A/2017 U1 was discovered Oct. 19 by the University of Hawaii's Pan-STARRS 1 telescope on Haleakala, Hawaii, during the course of its nightly search for near-Earth objects for NASA.
A few more highlights for November. https://www.jpl.nasa.gov/video/details.php?id=1505Stavros Kiri said:
Saw it! ... Cool!Stavros Kiri said:
When I heard about that, the first thing that came to mind was the opening scenes in "Heavy Metal" where the 'Vette does a reentry. from a shuttle. Makes me wonder what his long term plans are for the payload. One must admit it's going to be great advertising for his cars, if it makes it into orbit it will be another SpaceX first as well as an automotive first (Lunar Rovers notwithstanding). Crossing the Martian orbit will just be practice for upcoming events.mfb said:The payload will be Elon Musk's private Tesla Roadster
1oldman2 said:This is worth zooming in, note the red and blue noise in the bottom left corner.
Heading for "Space Cops" too! (I have a couple of cops friends already strongly interested to promote to that era ...)ISamson said:What NASA's Mock Space Missions Tell Us About the Need for Martian Law
https://www.space.com/39034-nasa-mock-space-missions-martian-law.html