News tagged with spiral arm

A star with spiral arms

For more than four hundred years, astronomers have used telescopes to study the great variety of stars in our galaxy. Millions of distant suns have been catalogued. There are dwarf stars, giant stars, dead ...

Nov 01, 2011
4.6 / 5 (11) 17 | with audio podcast

Spiral arms hint at the presence of planets

A new image of the disk of gas and dust around a sun-like star has spiral-arm-like structures. These features may provide clues to the presence of embedded but as-yet-unseen planets.

Oct 19, 2011
4.3 / 5 (6) 2

Galaxy caught blowing bubbles

(PhysOrg.com) -- Hubble's famous images of galaxies typically show elegant spirals or soft-edged ellipses. But these neat forms are only representative of large galaxies. Smaller galaxies like the dwarf irregular ...

Sep 29, 2011
4.9 / 5 (7) 12 | with audio podcast

A spiral in Leo

(PhysOrg.com) -- This new picture from ESO’s Very Large Telescope shows NGC 3521, a spiral galaxy located about 35 million light years away in the constellation of Leo (The Lion). Spanning about 50 000 ...

Aug 10, 2011
4.8 / 5 (8) 4 | with audio podcast

A new, distant arm of the Milky Way galaxy

(PhysOrg.com) -- Our Milky Way galaxy, like other spiral galaxies, has a disk with sweeping arms of stars, gas, and dust that curve around the galaxy like the arms of a huge pinwheel.

Jun 13, 2011
4.6 / 5 (22) 1 | with audio podcast

Testing the spiral density wave theory

Spiral galaxies are one of the most captivating structures in astronomy, yet their nature is still not fully understood. Astronomers currently have two categories of theories that can explain this structure, ...

May 30, 2011
4.7 / 5 (7) 4

Two views of a lopsided galaxy (w/ video)

(PhysOrg.com) -- The Meathook Galaxy, or NGC 2442, has a dramatically lopsided shape. One spiral arm is tightly folded in on itself and host to a recent supernova, while the other, dotted with recent star ...

May 04, 2011
4.5 / 5 (2) 19 | with audio podcast

New theory of evolution for spiral galaxy arms

(PhysOrg.com) -- A study of spiral patterns found in galaxies like our Milky Way could overturn the theory of how the spiral arm features form and evolve. The results are being presented by postgraduate student, ...

Apr 21, 2011
4.8 / 5 (12) 16 | with audio podcast

A disturbed galactic duo

(PhysOrg.com) -- The galaxies in this cosmic pairing, captured by the Wide Field Imager on the MPG/ESO 2.2-metre telescope at the La Silla Observatory in Chile, display some curious features, demonstrating ...

Apr 20, 2011
5 / 5 (5) 4 | with audio podcast

Spitzer captures infrared rays from a sunflower

(PhysOrg.com) -- The various spiral arm segments of the Sunflower galaxy, also known as Messier 63, show up vividly in this image taken in infrared light by NASA's Spitzer Space Telescope. Infrared light is ...

Mar 04, 2011
5 / 5 (8) 20

The dusty disc of NGC 247

This image of NGC 247, taken by the Wide Field Imager on the MPG/ESO 2.2-metre telescope at ESO's La Silla Observatory in Chile, reveals the fine details of this highly inclined spiral galaxy and its rich ...

Mar 02, 2011
5 / 5 (3) 0 | with audio podcast

Milky Way stars move in mysterious ways

Rather than moving in circles around the center of the Milky Way, all the stars in our Galaxy are travelling along different paths, moving away from the Galactic center. This has just been evidenced by Arnaud ...

Nov 30, 2010
4.7 / 5 (29) 21 | with audio podcast