Free planetarium

 
A-L-E-X
World Builder
World Builder
Posts: 804
Joined: 06 Mar 2017

Science and Astronomy News

31 Aug 2017 12:09

Spacer wrote:

omg this is big news!  Let's see how close SE ends up to reality :)
 
A-L-E-X
World Builder
World Builder
Posts: 804
Joined: 06 Mar 2017

Science and Astronomy News

31 Aug 2017 12:24

https://phys.org/news/2017-08-hubble-hi ... anets.html

An international team of astronomers used the NASA/ESA Hubble Space Telescope to estimate whether there might be water on the seven earth-sized planets orbiting the nearby dwarf star TRAPPIST-1. The results suggest that the outer planets of the system might still harbour substantial amounts of water. This includes the three planets within the habitable zone of the star, lending further weight to the possibility that they may indeed be habitable.
On 22 February 2017 astronomers announced the discovery of seven Earth-sized planets orbiting the ultracool dwarf star TRAPPIST-1, 40 light-years away. This makes TRAPPIST-1 the planetary system with the largest number of Earth-sized planets discovered so far.
Following up on the discovery, an international team of scientists led by the Swiss astronomer Vincent Bourrier from the Observatoire de l'Université de Genève, used the Space Telescope Imaging Spectrograph (STIS) on the NASA/ESA Hubble Space Telescope to study the amount of ultraviolet radiation received by the individual planets of the system. "Ultraviolet radiation is an important factor in the atmospheric evolution of planets," explains Bourrier. "As in our own atmosphere, where ultraviolet sunlight breaks molecules apart, ultraviolet starlight can break water vapour in the atmospheres of exoplanets into hydrogen and oxygen."


Read more at: https://phys.org/news/2017-08-hubble-hi ... s.html#jCp

https://phys.org/news/2017-08-largest-a ... -sept.html

https://phys.org/news/2017-08-ancient-w ... iants.html

https://phys.org/news/2017-08-antidepre ... lakes.html

Human antidepressants are building up in the brains of bass, walleye and several other fish common to the Great Lakes region, scientists say.
In a new study, researchers detected high concentrations of these drugs and their metabolized remnants in the brain tissue of 10 fish species found in the Niagara River.
This vital conduit connects two of the Great Lakes, Lake Erie and Lake Ontario, via Niagara Falls. The discovery of antidepressants in aquatic life in the river raises serious environmental concerns, says lead scientist Diana Aga, PhD, the Henry M. Woodburn Professor of Chemistry in the University at Buffalo College of Arts and Sciences.
"These active ingredients from antidepressants, which are coming out from wastewater treatment plants, are accumulating in fish brains," Aga says. "It is a threat to biodiversity, and we should be very concerned.
"These drugs could affect fish behavior. We didn't look at behavior in our study, but other research teams have shown that antidepressants can affect the feeding behavior of fish or their survival instincts. Some fish won't acknowledge the presence of predators as much."


Read more at: https://phys.org/news/2017-08-antidepre ... s.html#jCp

https://phys.org/news/2017-08-black-hol ... andia.html\

A long-standing but unproven assumption about the X-ray spectra of black holes in space has been contradicted by hands-on experiments performed at Sandia National Laboratories' Z machine.
Z, the most energetic laboratory X-ray source on Earth, can duplicate the X-rays surrounding black holes that otherwise can be watched only from a great distance and then theorized about.
"Of course, emission directly from black holes cannot be observed," said Sandia researcher and lead author Guillaume Loisel, lead author for a paper on the experimental results, published in August in Physical Review Letters. "We see emission from surrounding matter just before it is consumed by the black hole. This surrounding matter is forced into the shape of a disk, called an accretion disk."
The results suggest revisions are needed to models previously used to interpret emissions from matter just before it is consumed by black holes, and also the related rate of growth of mass within the black holes. A black hole is a region of outer space from which no material and no radiation (that is, X-rays, visible light, and so on) can escape because the gravitational field of the black hole is so intense.
"Our research suggests it will be necessary to rework many scientific papers published over the last 20 years," Loisel said. "Our results challenge models used to infer how fast black holes swallow matter from their companion star. We are optimistic that astrophysicists will implement whatever changes are found to be needed."


Read more at: https://phys.org/news/2017-08-black-hol ... a.html#jCp



https://phys.org/news/2017-08-universe.html

Soon after the Big Bang, the universe went completely dark. The intense, seminal event that created the cosmos churned up so much hot, thick gas that light was completely trapped. Much later—perhaps as many as one billion years after the Big Bang—the universe expanded, became more transparent, and eventually filled up with galaxies, planets, stars, and other objects that give off visible light. That's the universe we know today.
How it emerged from the cosmic dark ages to a clearer, light-filled state remains a mystery.
In a new study, researchers at the University of Iowa offer a theory of how that happened. They think black holes that dwell in the center of galaxies fling out matter so violently that the ejected material pierces its cloudy surroundings, allowing light to escape. The researchers arrived at their theory after observing a nearby galaxy from which ultraviolet light is escaping.


Read more at: https://phys.org/news/2017-08-universe.html#jCp
 
User avatar
JackDole
World Builder
World Builder
Posts: 607
Joined: 02 Nov 2016
Location: Terra

Science and Astronomy News

31 Aug 2017 12:33

Spacer wrote:
Source of the post Hubble delivers first hints of possible water content of TRAPPIST-1 planets

The video shown on this page is made with SpaceEngine.
 
User avatar
Spacer
Explorer
Explorer
Posts: 275
Joined: 22 Aug 2016
Location: mevaseret zion, israel

Science and Astronomy News

31 Aug 2017 12:54

JackDole wrote:
Source of the post The video shown on this page is made with SpaceEngine.

yeah noticed too. it's ESA video and i think they use SE. i think they got license from vladimir.
too bad they write artist impression and not from SE.
that way more people can know SE
"Exploration is in our nature. We began as wanderers, and we are wanderers still"
-carl sagan
 
A-L-E-X
World Builder
World Builder
Posts: 804
Joined: 06 Mar 2017

Science and Astronomy News

31 Aug 2017 13:09

JackDole wrote:
Spacer wrote:
Source of the post Hubble delivers first hints of possible water content of TRAPPIST-1 planets

The video shown on this page is made with SpaceEngine.

They must be using it pre-patch then :P  I lost my clouds and the rippling of waves on the water and solar reflections after installing the patch.
 
User avatar
XBrain130
Explorer
Explorer
Posts: 254
Joined: 26 Nov 2016
Location: Italy
Contact:

Science and Astronomy News

31 Aug 2017 13:53

Spacer wrote:
Source of the post too bad they write artist impression and not from SE.

actually, they credit "spaceengine.org" in both the caption on the article and the video description on YouTube :)
SpaceEngine's Italian Discord server: https://discord.gg/NhQbEbC
 
A-L-E-X
World Builder
World Builder
Posts: 804
Joined: 06 Mar 2017

Science and Astronomy News

31 Aug 2017 13:57

XBrain130 wrote:
Spacer wrote:
Source of the post too bad they write artist impression and not from SE.

actually, they credit "spaceengine.org" in both the caption on the article and the video description on YouTube :)

Well to be fair SE is both a scientist and an artist.  My main objection is that people refer to it as a "game."  It is astronomy simulation software- not a game.
 
User avatar
Spacer
Explorer
Explorer
Posts: 275
Joined: 22 Aug 2016
Location: mevaseret zion, israel

Science and Astronomy News

31 Aug 2017 15:18

XBrain130 wrote:
Source of the post actually, they credit "spaceengine.org" in both the caption on the article and the video description on YouTube

ohh now i notcied it  :)
"Exploration is in our nature. We began as wanderers, and we are wanderers still"
-carl sagan
 
 
A-L-E-X
World Builder
World Builder
Posts: 804
Joined: 06 Mar 2017

Science and Astronomy News

31 Aug 2017 16:15

There's also been a big auroral outburst ongoing seen as far away as Chicago and Australia.
 
A-L-E-X
World Builder
World Builder
Posts: 804
Joined: 06 Mar 2017

Science and Astronomy News

31 Aug 2017 18:21

I just did a quick survey of the 7 Trappist-1 planets plus Proxima Centauri b- some of the planets have atmospheres some don't.  None of them have the rippling water effect that was there prepatch.  Out of the Trappist system, only planets c and b still have atmospheres.  One of them has an atmosphere but you can never see the ground even during the day (f).   With the others you can see the stars all the time and the sky is black.  On some of them there is a faint glow of red near the horizon but the rest of the sky is black.  Proxima b shows stars all the time even when the sky is a faint red.  I also checked procedural planets and they still retain texture, clouds and sky color (I tested 12 Ceti 2).
 
User avatar
ARBB
Astronaut
Astronaut
Posts: 69
Joined: 04 Aug 2016
Location: Doom.
Contact:

Science and Astronomy News

04 Sep 2017 13:32

S M OO T H RºCªMBºLºNE
 
User avatar
midtskogen
Pioneer
Pioneer
Posts: 402
Joined: 11 Dec 2016
Location: Oslo, Norway
Contact:

Science and Astronomy News

05 Sep 2017 04:45

Earth is in for a direct hit from a solar storm just launched.
NIL DIFFICILE VOLENTI
 
User avatar
Watsisname
Science Officer
Science Officer
Posts: 937
Joined: 06 Sep 2016
Location: Bellingham, WA

Science and Astronomy News

05 Sep 2017 05:01

Cool!  Too bad it's only a day from the full Moon. =(  If the weather and CME forecast are good I'll go out to look for aurora anyway.
 
User avatar
midtskogen
Pioneer
Pioneer
Posts: 402
Joined: 11 Dec 2016
Location: Oslo, Norway
Contact:

Science and Astronomy News

05 Sep 2017 05:17

I don't have high hopes. :/
met.png
NIL DIFFICILE VOLENTI

Who is online

Users browsing this forum: No registered users and 1 guest