1. The countdown has begun for Felix Baumgartner's epic jump from the edge of space. Supported by a team of experts, Felix will ascend in a helium balloon to an altitude of 120,000 ft / 36,576 m where he will take a leap of faith into the unknown in an attempt to become the first person to break the speed of sound during freefall.

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  2. Explore M82 X-1 and learn more about how astronomers used X-ray fluctuations to determine its status as an intermediate-mass black hole.

    Credits: NASA Goddard Space Flight Center

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  3. On Aug. 24, 2014, the sun emitted a mid-level solar flare, peaking at 8:16 a.m. EDT. NASA's Solar Dynamics Observatory and STEREO captured images of the flare, which erupted on the left side of the sun. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel.

    More info: nasa.gov

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