Global eruption on the Sun

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On August 1, 2010, an entire hemisphere of the sun erupted. It consisted of over a dozen shock waves, flares, filament eruptions, and coronal mass ejections that covered half of the sun’s surface and took place over a period of 28 hours. It was big, really big.
The event was recorded …

What is a Galaxy?

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While many people would probably be able to describe what a galaxy is, there is actually no clear answer to that question. According to most dictionaries, a galaxy is a large group of stars and other elements that exist in space as independent systems. But, how many stars is exactly …

Impact on Jupiter: it was an asteroid

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An asteroid about the size of the Titanic caused the dark spot that appeared in Jupiter’s atmosphere on July 19, 2009, according to two papers published recently in the journal Icarus.
Collisions more frequent than we thought
An international team studied the atmospheric temperatures and chemical conditions associated with the impact debris …

The oldest galaxy

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The Hubble Space Telescope has glimpsed what might be the most distant galaxy ever detected. It is 13.2 billion light-years away from Earth (the Universe was then about 480 million years old). This discovery reveals that galaxies were forming and growing quite fast in the very early Universe, but also …

Opportunity: 7 years on Mars

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NASA’s rover Opportunity landed on the red planet on January 25, 2004, to explore the area of Meridiani Planum. Seven years later, it is still working, with 26.7 kilometers on the clock. It is getting closer to its destination, a 22 kilometers wide crater, now about 6 kilometers away.
Breaking records
Originally …

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