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What are white holes?

Black holes are created when stars die catastrophically in a supernova. So what in the universe is a white hole?

date3 hours ago in Astronomy
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Peeking into our galaxy's stellar nursery

Astronomers have long turned their telescopes, be they on satellites in space or observatories on Earth, to the wide swaths of interstellar medium to get a look at the formation and birth of stars. However, the images produced ...

dateOct 05, 2015 in Astronomy
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How big is the universe?

Our brains struggle to comprehend how big the universe is because everything here on Earth, and even the Earth itself, is very small when compared to the immense scale of the universe.

dateOct 05, 2015 in Astronomy
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Researchers find a new way to weigh a star

Researchers from the University of Southampton have developed a new method for measuring the mass of pulsars – highly magnetised rotating neutron stars formed from the remains of massive stars after they explode into supernovae.

dateOct 05, 2015 in Astronomy
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The golden anniversary of black-hole singularity

When a star collapses forming a black hole, a space-time singularity is created wherein the laws of Physics no longer work. In 1965 Sir Roger Penrose presented a theorem where he associated that singularity with so-called ...

dateOct 01, 2015 in Astronomy
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First gamma-ray Images from new H.E.S.S. camera

The first of four new gamma-ray cameras has recorded its first light at the gamma-ray observatory H.E.S.S. (High Energy Stereoscopic System) in Namibia. In July, a team of ten colleagues from DESY Zeuthen had upgraded the ...

dateOct 01, 2015 in Astronomy
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Searching for orphan stars amid starbirth fireworks

A new Gemini Observatory image reveals the remarkable "fireworks" that accompany the birth of stars. The image captures in unprecedented clarity the fascinating structures of a gas jet complex emanating from a stellar nursery ...

dateSep 30, 2015 in Astronomy
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An army of tiny robots that tracks galaxies

Why is the universe expanding at an increasing rate? Scientists will attempt to gain a better understanding of this phenomenon by mapping the distribution of galaxies in the universe. Astrophysicists and robotics engineers ...

dateSep 30, 2015 in Astronomy
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The most stable source of light in the world

In order to be able to detect planets comparable to Earth, the CHEOPS satellite, which will be sent into orbit at the end of 2017, must be able to measure the luminosity of a star with inimitable accuracy. In order to test ...

dateSep 30, 2015 in Astronomy
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Can you kill a star with iron?

Since the energy required to fuse iron is more than the energy that you get from doing it, could you use iron to kill a star like our sun?

dateSep 29, 2015 in Astronomy
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When black holes collide

Picture the scene: two gigantic black holes, each one a good fraction of the size of our Solar System spiralling around each other. Closer and closer they draw until they touch and merge into a single, even more gigantic ...

dateSep 29, 2015 in Astronomy
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Launch of Astrosat first Indian astronomy satellite

The first Indian astronomy satellite Astrosat was launched on 28th September, 2015, by the Indian Space Research Organisation (ISRO) from Sriharikota, on a PSLV (Polar Satellite Launch Vehicle) rocket. Astrosat has unprecedented ...

dateSep 28, 2015 in Astronomy
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Discovery of the companions of millisecond pulsars

When a star with a mass of roughly ten solar masses finishes its life, it does so in a spectacular explosion known as a supernova, leaving behind as remnant "ash" a neutron star. Neutron stars have masses of one-to-several ...

dateSep 28, 2015 in Astronomy
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11-year cosmic search leads to black hole rethink

One hundred years since Einstein proposed gravitational waves as part of his general theory of relativity, an 11-year search performed with CSIRO's Parkes telescope has failed to detect them, casting doubt on our understanding ...

dateSep 24, 2015 in Astronomy
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How the universe's brightest galaxies were born

The brightest galaxies in our universe are fuelled by what their gravity sucks in, not through explosive mergers of star systems as scientists previously argued, researchers said Wednesday.

Black hole is 30 times expected size

The central supermassive black hole of a recently discovered galaxy is far larger than should be possible, according to current theories of galactic evolution. New work, carried out by astronomers at Keele University and ...

Surprising giant ring-like structure in the universe

(—Five billion light years is a distance almost inconceivable, even on a cosmic scale. To better illustrate the extent of this physical quantity, it's enough to say that 35,000 galaxies the size of our Milky Way ...

Milky Way's black hole shows signs of increased chatter

Three orbiting X-ray space telescopes have detected an increased rate of X-ray flares from the usually quiet giant black hole at the center of our Milky Way galaxy after new long-term monitoring. Scientists are trying to ...

Revisiting the Veil Nebula

Deriving its name from its delicate, draped filamentary structures, the beautiful Veil Nebula is one of the best-known supernova remnants. It formed from the violent death of a star twenty times the mass of the Sun that exploded ...

A cosmic rose with many names

This new image of the rose-colored star forming region Messier 17 was captured by the Wide Field Imager on the MPG/ESO 2.2-meter telescope at ESO's La Silla Observatory in Chile. It is one of the sharpest images showing the ...

Astronomers identify a new mid-size black hole

Nearly all black holes come in one of two sizes: stellar mass black holes that weigh up to a few dozen times the mass of our sun or supermassive black holes ranging from a million to several billion times the sun's mass. ...

Astronomers discover a tenth transiting "Tatooine"

Astronomers at the 29th International Astronomical Union General Assembly will announce on August 14 the discovery of a new transiting "circumbinary" planet, bringing the number of such known planets into double digits. A ...

Is the universe ringing like a crystal glass?
Researchers propose new way to chart the cosmos in 3D
Charting the slow death of the Universe
Exiled stars explode far from home
Monster black hole wakes up after 26 years
Distant black hole wave twists like giant whip
First detection of lithium from an exploding star
NASA telescopes set limits on space-time quantum 'foam'
Helium-shrouded planets may be common in our galaxy
Radio astronomers see black hole come to life
Jupiter twin discovered around solar twin
Can planets be rejuvenated around dead stars?

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