Feedback and Notes

 No Gods or Scumps Allowed

Latest Activity

Onyango Makagutu commented on Hope's group Imagine No Organized Religion, Please!
"People still believe in miracles. Maybe I should also be made saint"
1 hour ago
Onyango Makagutu commented on Hope's group Imagine No Organized Religion, Please!
"Religion is useful to the rulers and Trump is using it to his advantage. To counteract this, people…"
1 hour ago
Tom Sarbeck commented on Hope's group Imagine No Organized Religion, Please!
"Rulers use religion. —Seneca(?) What would increase the effectiveness of our attempts to…"
9 hours ago
Stephen commented on Doone's group The Burgeoning Problem of Living on Earth with a Cockwomble as the Most Powerful Person News
"The UK has resisted the creation of ID Cards even during the war. Besides it smacks as a way for…"
9 hours ago
Mrs.B commented on Doone's group The Burgeoning Problem of Living on Earth with a Cockwomble as the Most Powerful Person News
"We've had photo ID for quite sometime."
9 hours ago
Stephen commented on Doone's group The Burgeoning Problem of Living on Earth with a Cockwomble as the Most Powerful Person News
"Voter ID: Government announces plan to prevent UK citizens voting without photographic proof of…"
10 hours ago
Stephen replied to Sydni Moser's discussion Strawberry Dishes to Make Now in the group Vegetarian and Vegan Atheists
"Strawberry and Kiwi smoothie you can't go wrong with those two."
14 hours ago
Stephen left a comment for Kami
"Happy Birthday, Kami! Have a great day."
15 hours ago
Stephen left a comment for jessica stanfield
"Happy Birthday, Jessica. Have a great day."
15 hours ago
Stephen commented on Stephen's group Secularism in the UK and Europe.and all those lucky places that doesnt have Trump as its leader
"Operation Christmas Child: Does its charity benefit the public? Samaritan's Purse is again…"
15 hours ago
Stephen commented on Stephen's group Secularism in the UK and Europe.and all those lucky places that doesnt have Trump as its leader
"Don’t take lessons on democracy from Church of England bishopshe bishop of London has…"
16 hours ago
Doone commented on Hope's group Imagine No Organized Religion, Please!
"Disturbing ideas about how the Scump Admin views religion Attorney General Bill Barr: "This is…"
21 hours ago
Ana Pirs replied to Sydni Moser's discussion Strawberry Dishes to Make Now in the group Vegetarian and Vegan Atheists
"OMG! I love it, I  love it, I love it! Strawberry art!)) I like Smoothie with Strawberry…"
23 hours ago
Ana Pirs replied to Jean Marie's discussion VEGAN lasagne? in the group Vegetarian and Vegan Atheists
"Lasagna wirhout cheese?  It's impossible I think!)) Cheese is the most basic in…"
23 hours ago
Doone commented on Hope's group Imagine No Organized Religion, Please!
"Imagine No Scump "
yesterday
Doone commented on Hope's group Imagine No Organized Religion, Please!
"Holy Monkey, the rules for saints are so ridiculous - they should just give out Sainthoods for…"
yesterday
Stephen commented on Stephen's group Secularism in the UK and Europe.and all those lucky places that doesnt have Trump as its leader
"Ritual infant circumcision “morally impermissible”, say experts The religious and…"
yesterday
Mrs.B commented on Hope's group Imagine No Organized Religion, Please!
"Such a farce."
yesterday
Stephen left a comment for Todd Nichols
"Happy birthday Todd. Have a great day"
yesterday
Stephen left a comment for Terri Vandenhende
"Happy birthday, Have a great day "
yesterday

We are a worldwide social network of freethinkers, atheists, agnostics and secular humanists.

The Daily Cosmos or Interesting Facts about the Universe

Information

The Daily Cosmos or Interesting Facts about the Universe

Cosmology
Astrophysics
Astronomy

Location: #science
Members: 57
Latest Activity: on Friday

 

Cosmology - Astrophysics - Astronomy

 

Hubble Wallpaper - Awesome Hubble Images

Discussion Forum

Big Bangers' Imaginations Supply Their Story's Only Support.

Started by Tom Sarbeck. Last reply by Joey Daniel Smith Dec 22, 2018. 7 Replies

'Hot Jupiter'

Started by Mrs.B. Last reply by Mrs.B Apr 9, 2016. 7 Replies

NASA's Solomon's Choice.

Started by Davy Oct 3, 2013. 0 Replies

This is Science at Work.

Started by Davy. Last reply by Davy Aug 15, 2013. 1 Reply

Starts With A Bang

Loading… Loading feed

Comment Wall

Nice Comment

You need to be a member of The Daily Cosmos or Interesting Facts about the Universe to add comments!

Comment by Doone on March 27, 2011 at 5:31am

See Explanation. Clicking on the picture will download the highest resolution version available.

Valles Marineris: The Grand Canyon of Mars 
Credit: Viking ProjectUSGSNASA

Explanation: The largest canyon in the Solar System cuts a wide swath across the face of Mars. Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the Earth's Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the Valles Marineris remains unknown, although a leading hypothesis holds that it started as a crack billions of years ago as the planet cooled. Several geologic processes have been identified in the canyon. The above mosaic was created from over 100 images of Mars taken by Viking Orbiters in the 1970s.

Comment by Jean Marie on March 25, 2011 at 1:42am

yet another amazing video from the link off of Radu's page:

 

Comment by Jean Marie on March 25, 2011 at 1:28am

i just swiped this awesome video off of Radu's page, fascinating, i smiled all the way from first moment to last:

Comment by Michel on March 24, 2011 at 1:44pm

WOW! Sun Eruption Creates Spectacular Plasma Tentacle

---------------------------------

A NASA spacecraft watching the sun has caught a dazzling view of a solar eruption that launched a vast tendril of magnetic plasma into space.

NASA's Solar Dynamics Observatory recorded the sun tentacle, which scientists call a solar prominence, on March 19 as it erupted into space with a rounded, twisting motion.

The eruption occurred over five hours as SDO watched the sun in the ultraviolet range of the light spectrum, SDO mission scientists said in a statement. The solar observatory watched as the prominence twisted up from the sun and expanded, then became unstable. [Video: Round Eruption From the Sun]

Ultimately, the sun filament lost cohesion and its particles streamed away from the sun.

"Prominences are elongated clouds of plasma that hover above the sun's surface, tethered by magnetic forces," SDO mission scientists explained.

The sun is currently in the midst of an active phase of its 11-year solar weather cycle and has kicked up a series of powerful eruptions and flares in recent months. The SDO spacecraft and other space observatories are keeping a close watch on the sun to monitor is solar weather activity. [Amazing Sun Photos from Space]

 

Earlier this month, the sun unleashed its second X-class solar flare of the year that was aimed at Earth. X-class solar flares are the strongest types of solar flares. The weakest types of solar flares are Class C sun storms, with Class M flares registering as medium strength, but still powerful, NASA scientists have said.

Strong solar flares, when aimed at Earth, can potentially disrupt satellites and power grids, as well as pose a hazard to astronauts on spacecraft. They can also spark dazzling shows of the northern lights, or aurora borealis.

 

---------------------------------

Space.com

Comment by Doone on March 23, 2011 at 8:27pm

From Starts with a Bang

 

Except, that is, near the North and South magnetic poles, where those field lines all appear to enter/exit our planet. And whenever the Sun emits a flare, prominence, or other "event," here's what happens.

solarflaremagneticfieldMSFC.jpg

(Image credit: NASA's Marshall Space Flight Center.)

 

Comment by Michel on March 23, 2011 at 2:42pm

Eye Candy: The Square Nebula

From APOD.


Explanation: What could cause a nebula to appear square? No one is quite sure. The hot star system known as MWC 922, however, appears to be embedded in a nebula with just such a shape. The above image combines infrared exposures from the Hale Telescope on Mt. Palomar in California, and the Keck-2 Telescope on Mauna Kea in Hawaii. A leading progenitor hypothesis for the square nebula is that the central star or stars somehow expelled cones of gas during a late developmental stage. For MWC 922, these cones happen to incorporate nearly right angles and be visible from the sides. Supporting evidence for the cone hypothesis includes radial spokes in the image that might run along the cone walls. Researchers speculate that the cones viewed from another angle would appear similar to the gigantic rings of supernova 1987A, possibly indicating that a star in MWC 922 might one day itself explode in a similar supernova.

Comment by Michel on March 23, 2011 at 2:23pm

DEEP SPACE - Brown dwarf could be coldest known star
CBC News Posted: Mar 23, 2011 10:23 AM ET

Astronomers say they've found a new candidate for the coldest known star — a brown dwarf with the temperature of a freshly made cup of tea.

While you might burn yourself drinking such a tea, at 100 degrees Celsius, the boiling point of water is actually extremely cold for the surface of a star. The temperature of Earth's sun, for example, is about 5,500 C.

Scientists liken brown dwarfs to failed stars because they aren't big enough for gravity to trigger the nuclear reactions that make stars shine. Astronomers say such discoveries are significent because a brown dwarf is not exactly a star and not exactly a planet, but instead something between the two, and hence can teach us about the physics of both.

Working with the European Southern Observatory's Very Large Telescope, astronomers say the newly-discovered brown dwarf is one of a pair in a double system 75 light-years from Earth. Astronomers describe the brown dwarfs, identified as CFBDSIR 1458+10B, in a paper in the current issue of The Astrophysical Journal.

"At such temperatures we expect the brown dwarf to have properties that are different from previously known brown dwarfs and much closer to those of giant exoplanets — it could even have water clouds in its atmosphere," the paper's lead author, Michael Liu of the University of Hawaii's Institute for Astronomy, said in a release.

The team of researchers, which included Etienne Artigau of the Université de Montréal, is not ready to say it has definitively found the coldest known star.

That's because another team working with NASA's infrared Spitzer Space Telescope recently identified two other very faint objects as other possible candidates, although their temperatures have not yet been measured so precisely.

 

This artist's impression shows the pair of brown dwarfs named CFBDSIR 1458+10. They are the coolest pair of brown dwarfs found so far. The colder of the two components (shown in the background) is a candidate for the brown dwarf with the lowest temperature ever found. (L. Calcada/ESO)

Comment by Michel on March 23, 2011 at 2:12pm



Testing gravity in gas-rich galaxies

Karen Masters & Kristine Spekkens

The rotation curve of a galaxy is the orbital speed of material as a function of distance from the center of the galaxy. In the 1970s, the astronomer Vera Rubin measured the rotation curves of several of the nearest spiral galaxies. To her astonishment, the curves remained flat beyond the edge of the galaxy’s stellar disc . Under the standard theory of gravity this implies that the mass in the outskirts of these systems far outweighs that of the detected gas and stars. Today, the flatness of spiral galaxy rotation curves remains key evidence for dark matter, which, broadly defined, is matter that obeys the law of gravity but does not emit any light.

Dark matter is an integral component of the currently favored cosmological model, in which over 90% of the matter in the Universe is made up of massive (“cold”) particles, which interact only via gravity. The model is named Lambda-Cold Dark Matter (ΛCDM), with Λ denoting a cosmological constant (sometimes called “dark energy”) that accelerates expansion at late cosmological times. An impressive array of observations fit this picture, from the spectrum of fluctuations in the cosmic microwave background (the first free-streaming photons in the Universe, e.g., Ref. [2]), to the luminosities of distant supernovae. The astrophysical community has adopted ΛCDM as the standard cosmological model, which makes the nature of dark matter one of the most important outstanding questions in the field.

But not all cosmologists are happy with this picture. Some are uneasy with the unknown components in the standard model, and worry that cosmology in the last 30 years has degraded into “naming the unknown” . In spiral galaxies at least, an alternative to invoking dark matter is to modify the theory of gravity in regions where there is a discrepancy between the mass inferred from dynamics (using standard gravity) and the baryonic mass (i.e., the census of normal material detected in stars and gas). The most successful of these ideas is MOND (Modified Newtonian Dynamics ), which modifies gravity at small accelerations to produce flat galactic rotation curves. For gravitational accelerations a less than some critical value a0, the usual Newtonian relation F=ma is modified to F=ma2/a0, and therefore the circular velocity around a mass M asymptotes to a constant value vf=(GMa0)1/4. Once the universal constant a0 is fixed observationally, MOND explains the rotation curve shapes of galaxies using their baryonic mass alone, while simultaneously accounting for the observed correlation between their rotation velocities and luminosities.

Read more here from Physics.
Via our Library/More... resource pages.

Comment by Doone on March 20, 2011 at 7:56pm

See Explanation. Clicking on the picture will download the highest resolution version available.

Parthenon Moon 
Image Credit & CopyrightAnthony Ayiomamitis (TWAN)

Explanation: Did you see the Full Moon last night? Near the horizon, the lunar orb may have seemed to loom large, swollen in appearance by the famous Moon illusion. But the Full Moon really was a large Full Moon last night, reaching its exact full phase within an hour of lunar perigee, the point in the Moon's elliptical orbit closest to planet Earth. A similar near perigee Full Moon last occured on December 12, 2008. The difference in the Moon's apparent size as it moves from perigee to apogee, its farthest point from Earth, is about 14 percent. Of course, a nearly Full Moon will rise again tonight, lighting the skies on the date of the Equinox or equal night. The Full Moon also looms large in this well-planned, telescopic lunar portrait. Captured earlier this year, the rising lunar orb is dramatically matched to the 2,500 year old Parthenon, in Athens, Greece.

Comment by Michel on March 19, 2011 at 6:12pm
This is now my new desktop wallpaper.
 
 
 

© 2019   Created by Atheist Universe.   Powered by

Badges  |  Report an Issue  |  Privacy Policy  |  Terms of Service