https://gregladen.com/blog/2008/02/02/happy-birthday-the-space-age/ Mon, 04 Feb 2008 03:04:52 +0000 hourly 1 https://wordpress.org/?v=6.4.8 https://gregladen.com/blog/2008/02/02/happy-birthday-the-space-age/#comment-3472 Mon, 04 Feb 2008 03:04:52 +0000 http://scienceblogs.com/gregladen/2008/02/02/happy-birthday-the-space-age/#comment-3472 Greg,I don’t know why they launched at night (the launcher might just have been ready then), but the top of it was spinning to stabilize the upper stages which didn’t have any sort of active guidance system.You can read all about it here:http://sortingoutscience.net/2008/01/31/explorer_1_at_50/

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