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The Summer 2020 issue of Mercury (Vol. 49 no. 3) is available to members, featuring discoveries from the Gaia spacecraft, news about the brightest Northern Hemisphere comet in decades, a poet's exploration of the Solar System, and more!

The medieval conjunction of Saturn and Jupiter was blamed for a plethora of events, including the greatest catastrophe to befall Europe.

Learn about Edwin Hubble, the namesake of the workhorse space telescope.

The Winter 2020 issue (vol. 49 no. 1) of Mercury magazine is online for ASP members, featuring a goodbye to Spitzer, kicking off a busy decade for Mars, and paying tribute to Katherine Johnson.

When thoughtful scientific examination sets the historic record straight.

Before we had high-resolution observations of the Sun, explanations for sunspots ranged from the ridiculous to the sublime.

Lunar rocks retain a million-year record of solar energetic particles and galactic cosmic rays.

Without her, the Hubble Space Telescope may not have gotten off the ground.

Computing celestial alignments may be routine today, but for medieval astronomers it was a major undertaking.

How the event helped a 14th Century astronomer reconnect with Ptolemy’s era.

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