Sentences with phrase «galactic arms»

It is proposed to be caused by the crossing of the galactic arms by the Solar system.

Data collected with the Hubble Space Telescope is helping astronomers map dark matter in space along with X-ray pictures of colliding galaxies, measurements of cosmic background radiation, and analysis of the way stars on the ends of galactic arms rotate.

Not exact matches

Yet, bizarrely, the galactic titan is rendered profoundly dim by its wispy spiral arms, spaced 10 times farther apart than in conventional spiral galaxies.

The more distant of these lies some 65,000 light years from the galactic centre, near the outer edge of the Milky Way's outermost arm (arxiv.org/abs/1006.1277).

We think we live in a spiral galaxy of the sort we see scattered throughout the cosmos, but our lowly viewpoint in the galactic disc means we struggle to trace how its arms are furled, or even count how many there are.

Dark atoms and molecules could perhaps clump together into galactic disks that overlap with the ordinary matter disks and spiral arms of galaxies such as Andromeda.

These spiral arms are actually waves of piled up gas and stars sweeping through the galactic disc, triggering sparkling bursts of star formation and leaving clusters like NGC 3590 in their wake.

The results indicate that for the Milky Way and other spiral galaxies, the most dangerous regions are in the galactic centers, whereas the more diffuse spiral arms pose fewer hazards and are therefore more hospitable to life.

The observations validate recent simulations by research groups at Princeton, Oxford, and Rutgers universities, which suggest that as the Milky Way's spiral arms and galactic bar travel in space, they can gravitationally deflect stars into streams that run inward or outward from the galactic core, like spokes in a wheel.

The odds of a planetary system containing habitable worlds far enough away from these stellar explosions increases far from the galactic center, peaking in the outer edges of the spiral arms, the team will report in an upcoming issue of the International Journal of Astrobiology.

The idea was revived in the 1920s to explain similar irregular movements among the stars in the Milky Way and later still to describe the formation of galactic spiral arms.

The remnants of its spiral structure can still be seen — the former galactic bulge now forms the «eye» of the penguin, around which it is still possible to see where the galaxy's pinwheeling arms once were.

One of our galaxy's arms may do a full 360, upping the chances that our galactic home is a rare cosmic beauty

In 2015, it came to light that NGC 1512 has a history when it comes to galactic cannibalism, as it was revealed that the outer regions of its spiral arms are actually formed from a separate, even older galaxy.

In addition, these stars are not orbiting the galactic center inside the Milky Way's spiral arms like the Sun, but they originate from the spherical Galactic halo that surrounds the Milky Way's main disk, while briefly intersecting it in their long, elliptical orbits around the center.

As a result, many specific structural features of the spiral arms are not well known, especially when compared with other spirals observed outside the Milky Way such as Andromeda (which is located a few million ly above the galactic plane of obscuring dust in the Milky Way's disk.

This makes sense most of the time, but confusingly, the section of this arm visible in Norma is actually in the inner galaxy close to the galactic bar.

In addition to these major arms, there are several other arms described in the section on the galactic bar below.

The driving force behind star formation is particularly unclear for a type of galaxy called a flocculent spiral, such as NGC 2841 shown here, which features short spiral arms rather than prominent and well - defined galactic limbs (Credit: NASA, ESA and the Hubble Heritage (STScI / AURA)- ESA / Hubble Collaboration Acknowledgment: M. Crockett and S. Kaviraj (Oxford University, UK), R. O'Connell (University of Virginia), B. Whitmore (STScI) and the WFC3 Scientific Oversight Committee.)

NASA (Shock rings around Supernova 1987A)-- larger image While primordial supernovas created much of the heavier elements such as iron found in the Solar System, Sol orbits the galactic core without frequent crossings of the spiral arms where life - threatening supernovas are more common.

Accordingly; as our solar system passes through the more dense parts of the Milky Way galaxy found in the arms and along the center of the galactic plane, it is subject to increasing amounts of GCRs.

Figure 4 - The top panel describes our passages through galactic spiral arms.

Well, Dr. Shaviv, having read your treatise on cosmic ray's influence on global climate based on our solar system's position in the galactic spiral arms, posted on your blog in 2006, I am wondering why you didn't get any credit for Svensmark's research.

Shaviv, N., Cosmic ray diffusion from the galactic spiral arms, iron meteorites, and a possible climate connection?

I will point out that newer estimates of transit times and positions of the galactic spiral arms are entirely inconsistent with both Shaviv's earlier estimates and as an explanation for the paleotemperature record.

Indeed, there is no consensus on the galactic structure, spiral arm pattern and speed, and much disagreement in million year temperature reconstructions.

So, if it will take as long to pass through the galactic spiral arms this time as it did 300 Ma ago, we have 25 to 50 Ma until we start to get out of the current ice age.

You have answered one by referring me to our previous comments — about 150 Ma cycle controlled related to galactic spiral arms, and tectonic plate locations.

GCRs are modulated by both solar magnetic field, which is largely unpredictable in strength except for generalities associated with 11 - year sunspot cycle and is also modulated by unpredictable events like nearby supernovas, and by more predictable very very long slow changes in intensity due to the solar system traversing spiral arms of our galaxy and wandering above and below the galactic plane in cycles lasting tens and hundreds of millions of years.