BlogArena

General blog about anything and everything of everyday's life.

19. Nov 2019

April 29, 2018
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A century of cepheids: Two astronomers, a hundred years apart, use stars to measure the universe

National Harbor, MD—How far away is that galaxy?  Our entire understanding of the Universe is based on knowing the distances to other galaxies, yet this seemingly-simple question turns out to be fiendishly difficult to answer. The best answer came more … Continue reading

November 23, 2015
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Zeitvergehen: Real, aber nur lokal

Die Vergangenheit ist „fix“ und unabänderlich, die Zukunft aber „offen“ und beeinflussbar. Seit Einstein wissen wir aber, dass es keine eindeutig definierte Gegenwart als „Trennlinie“ zwischen Vergangenheit und Zukunft gibt. Den scheinbaren Widerspruch zwischen Alltagserleben und Relativitätstheorie will der Philosoph … Continue reading

October 23, 2014
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The water in your bottle might be older than the sun

ANN ARBOR — Up to half of the water on Earth is likely older than the solar system itself, University of Michigan astronomers theorize. The researchers’ work, published in the current issue of Science, helps to settle a debate about … Continue reading

October 21, 2014
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Heritage of Earth’s water gives rise to hopes of life on other planets

A pioneering new study has shown that water found on Earth predates the formation of the sun – raising hopes that life could exist on exoplanets, the planets orbiting other stars in our galaxy. The ground-breaking research set out to … Continue reading

September 21, 2014
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The source of the sky’s X-ray glow

ANN ARBOR — In findings that help astrophysicists understand our corner of the galaxy, an international research team has shown that the soft X-ray glow blanketing the sky comes from both inside and outside the solar system. The source of … Continue reading

August 5, 2014
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The Most Precise Measurement of an Alien World’s Size

Thanks to NASA’s Kepler and Spitzer Space Telescopes, scientists have made the most precise measurement ever of the radius of a planet outside our solar system. The size of the exoplanet, dubbed Kepler-93b, is now known to an uncertainty of … Continue reading

June 11, 2014
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Nearest Bright ‘Hypervelocity Star’ Found

Speeding at 1 Million mph, It Probes Black Hole and Dark Matter A University of Utah-led team discovered a “hypervelocity star” that is the closest, second-brightest and among the largest of 20 found so far. Speeding at more than 1 … Continue reading

May 13, 2014
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Astronomers Find Sun’s ‘Long-Lost Brother,’ Pave Way for Family Reunion

AUSTIN, Texas — A team of researchers led by astronomer Ivan Ramirez of The University of Texas at Austin has identified the first “sibling” of the sun — a star almost certainly born from the same cloud of gas and … Continue reading