'Oumuamua has a rotation period of 8.1 hours, similar to Kuiper Belt objects implying a common origin in the vast depths of interstellar/intergalactic...

Okay, I've never heard anything about this before=E2=80=A6Somebody = please explain this: In scanning the wikipedia entry on "Escape Velocity",...

An impossible question? I would like to know if there is a straightforward way of calculating the sum of two different gravitational potentials U and V at...

If there is anew kind of attractive force, unknown to us, that pulls matter together, we should be able to see some effects of this feeble force in our...

As I read in the press, we have found a great percentage of dark matter. Astronomers have suceeded in seeing the shadows of filaments in the light of the CMB....

A smooth distribution corresponds to high entropy and a lumpy one to low entropy if gravity is not involved. For example, air in a room has high entropy,...

There have been many discussions here about WIMPs and searches for them. Today's CfA Colloquium given by Dan Hooper of Fermilab offered a good overview of the...

The article: https://www.newscientist.com/article/2149742-half-the-universes-missing-matter-has-just-been-finally-found/ claims that: "Half the universe's...

Does anyone know how to contact a real person in order to report bugs in Google Scholar Citations? In my own case (and certainly in that of many others as...

] Question: Is the spectral line signal for hydrogen different for hydrogen in hydrogen gas compared with hydrogen in water? Or, if one were observing the...

In sci.astro.research Steve Willner wrote: | As most of us probably know, the Cassini mission to Saturn will end | with the Grand...

A sample of 23 galaxies just 800 million years after the big bang was published by a team of astronomers: https://arxiv.org/abs/1703.02985v3 The article is...

Massive dead disk galaxy challenges theories of galaxy evolution https://www.sciencedaily.com/releases/2017/06/170621145150.htm This galaxy (3 times the mass...

The Million Quasars (Milliquas) catalogue presents a new release, v5.2, which includes just-published SDSS-DR14 and SDSS-DR14Q data. The count of type-I...

Caltech has demonstrated a camera without lenses. https://petapixel.com/2017/06/22/caltech-made-sensor-lensless-camera-future/ quote The camera has an...

reference to learn more about event horizons: http://cfpa.berkeley.edu/Education/BHfaq.html -- jt]] Good point about black holes. I neglected that...

I can't seem to find a definitive distinction between a galaxy with a type-II narrow-line AGN core and a so-called NELG ("narrow emission-line galaxy"). NELGs...

I emailed the question to the paper coauthor Michael Hudson, and he replied: In a nutshell, the filaments, like the rest of the Universe will still expand...

I guess that we can track the development of the filaments while the respective galaxy clusters continue to disperse. We should eventually be able to detect...

My publications are coming to an end, methinks, but throughout I was using a homegrown version of an all-sky optical catalogue, the likes of which seem...