News tagged with cepheid

RS Puppis puts on a spectacular light show

The NASA/ESA Hubble Space Telescope has observed the variable star RS Puppis over a period of five weeks, showing the star growing brighter and dimmer as it pulsates. These pulsations have created a stunning ...

Dec 17, 2013
4.6 / 5 (12) 1 | with audio podcast

Hubble views the star that changed the universe

(PhysOrg.com) -- Though the universe is filled with billions upon billions of stars, the discovery of a single variable star in 1923 altered the course of modern astronomy. And, at least one famous astronomer ...

May 23, 2011
4.3 / 5 (6) 51 | with audio podcast

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

The little Cepheid that stopped

When Hubble first discovered a Cepheid variable in the galaxy M31, the universe grew. Previously, many astronomers had held that the fuzzy “spiral nebulae” were small patches of gas and dust within ...

Jan 14, 2011
4.8 / 5 (5) 3

Cosmology standard candle not so standard after all

(PhysOrg.com) -- Astronomers have turned up the first direct proof that "standard candles" used to illuminate the size of the universe, termed Cepheids, shrink in mass, making them not quite as standard as ...

Jan 12, 2011
5 / 5 (15) 43 | with audio podcast

A New class for Tau Scorpii

Many classes of stars are named for an early, distinguished member of a certain type of stars. For example, Cepheid variables take their namesake from the periodic variable Delta Cephei, first recognized by ...

Dec 22, 2010
5 / 5 (4) 0

Pulsating star mystery solved

(PhysOrg.com) -- By discovering the first double star where a pulsating Cepheid variable and another star pass in front of one another, an international team of astronomers has solved a decades-old mystery. ...

Nov 24, 2010
4.9 / 5 (21) 5 | with audio podcast

The Polaris Cluster

(PhysOrg.com) -- A Cepheid star is one whose mass and age results in physical conditions that generate periodic oscillations in its photosphere. A Cepheid thus varies regularly in brightness, with a period ...

May 28, 2010
5 / 5 (2) 0 | with audio podcast