Today’s coverage of the Green Run hot fire test is starting at 3:45pm ET. The core stage for I is expected to ignite for about eight minutes to simulate a launch.

Got questions? Use the hashtag https://t.co/CtTdZpMLvl

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🌓 Icy moons
🌋 Volcanic planets
🔬 The search for ancient life

Our solar system is full of wonders & mysteries!

Reply with text or video to tell us your ?s about our planetary neighborhood. We will answer some of them in the next episode of

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Distant galaxies, exoplanets & more – has lifted the veil on the infrared universe. W/ its mission coming to an end, join us for a show celebrating the life & legacy of 1 of our Great Observatories. Ask ?s using

🗓️Jan. 22 at 1pm ET: https://t.co/rjrG6N9UOj

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Stormy weather... around the solar system.

Tune in to NASA Science Live for a look at severe weather on other planets, and how it helps us understand weather on Earth. Today at noon PT (3pm ET, 1900 UTC) on https://t.co/1ECd1Lj1d7

Tag questions for our experts

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Ask experts about a 200,000 light-year wave found in the Perseus cluster NOW - 3pm ET by using https://t.co/Tf7z8xCfct

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NOW: Listen in as our scientists discuss 2016 climate trends & their impacts. Qs? https://t.co/f1K1MFXFRn

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Are you watching? Our briefing on magnetic reconnection is live now: http://t.co/KX5g7yYnYG Q?

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