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RHESSI

Reuven Ramaty High Energy Solar Spectroscopic Imager

past Mission

Type

Orbiter

Launch

Feb. 5, 2002

Mission End

Aug. 16, 2018

Objective

Explore the basic physics of particle acceleration and energy release in solar flares

Studied solar flares and the explosive coronal mass ejections associated with them, super-energetic solar eruptive events that are the most extreme drivers of space weather, and which present significant dangers in space and on Earth.

Learn more about RHESSI

Latest News

Explore All RHESSI (Reuven Ramaty High Energy Solar Spectroscopic Imager) Stories
Article
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Article1 day ago
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The image is divided horizontally by an undulating line between a cloudscape forming a nebula along the bottom portion and a comparatively clear upper portion. Speckled across both portions is a starfield, showing innumerable stars of many sizes. The smallest of these are small, distant, and faint points of light. The largest of these appear larger, closer, brighter, and more fully resolved with 8-point diffraction spikes. The upper portion of the image is blueish, and has wispy translucent cloud-like streaks rising from the nebula below. The orangish cloudy formation in the bottom half varies in density and ranges from translucent to opaque. The stars vary in color, the majority of which have a blue or orange hue. The cloud-like structure of the nebula contains ridges, peaks, and valleys – an appearance very similar to a mountain range. Three long diffraction spikes from the top right edge of the image suggest the presence of a large star just out of view.

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