Chandra sees eclipsing planet in X-rays for first time
11 years, 7 months ago

Chandra sees eclipsing planet in X-rays for first time

The Hindu  

For the first time since exoplanets, or planets around stars other than the Sun, were discovered almost 20 years ago, X-ray observations have detected an exoplanet passing in front of its parent star. An advantageous alignment of a planet and its parent star in the system HD 189733, which is 63 light-years from Earth, enabled NASA’s Chandra X-ray Observatory and the European Space Agency’s XMM Newton Observatory to observe a dip in X-ray intensity as the planet transited the star. The stars likely formed at the same time, but the main star appears to be three billion to three-and-a-half billion years younger than its companion star because it rotates faster, displays higher levels of magnetic activity and is about 30 times brighter in X-rays than its companion. “It’s possible this hot Jupiter is keeping the star’s rotation and magnetic activity high because of tidal forces, making it behave in some ways like a much younger star,” Dr. Poppenhaeger said.

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Rare picture shows Jupiter surrounded by mysterious lumps invisible to telescopes
2 months, 1 week ago

Rare picture shows Jupiter surrounded by mysterious lumps invisible to telescopes

India Today  

In a rare first-of-its-kind image, Jupiter, the largest planet in the solar system is seen surrounded by colossal clouds of X-rays that have so far remained invisible to the eyes and even telescopes. Some of these lumps are even larger than the planet itself.⁣ The latest picture, shared by Nasa on the social media platform Instagram, shows Jupiter in stunning …

India's AstroSat unravels black hole secrets like never before
1 year, 1 month ago

India's AstroSat unravels black hole secrets like never before

India Today  

In a new study recently accepted in The Astrophysical Journal, an international team of scientists has used India's AstroSat's full multi-wavelength capabilities to unravel the mysteries of an X-ray binary system hosting a black hole. An X-ray binary system is a type of binary star system consisting of two celestial objects: a compact object, typically a neutron star or a …

Uranus Emits X-rays: Astronomers Detect Sun's Radiation Scattered by Icy Planet's Rings
3 years, 11 months ago

Uranus Emits X-rays: Astronomers Detect Sun's Radiation Scattered by Icy Planet's Rings

News 18  

The seventh planet of our Solar System seems to be emitting X-rays in which a recent study has revealed. Examining the two visuals of the planet taken by the National Aeronautics and Space Administration’s Chandra Observatory in 2002 and 2017, a team of nine scientists has discovered that the iced planet might also be emitting the X-rays, a fact that …

X-ray universe
9 years, 5 months ago

X-ray universe

The Hindu  

As Astrosat, the multi-wavelength X-ray astronomy satellite of the Indian Space Research Organisation, sits on the launch pad at the Satish Dhawan Space Centre in Sriharikota waiting to be lifted into the skies by the Polar Satellite Launch Vehicle on September 28, the question one might ask is, why is X-ray astronomy important? The X-Ray Telescope aboard the National Aeronautics …

Astronomers spot lightest exoplanet
11 years, 9 months ago

Astronomers spot lightest exoplanet

The Hindu  

Astronomers may have discovered the lightest exoplanet ever seen, which appears just as a dot orbiting a young star. “Direct imaging of planets is an extremely challenging technique that requires the most advanced instruments, whether ground-based or in space,” said Julien Rameau from Institut de Planetologie et d’Astrophysique de Grenoble, France. The observations were made using infrared light and a …

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