NASA @NASA
No one knows when the first stars in our universe burst to life — but @NASAspitzer has revealed clues about the Epoch of Reionization, a cosmic event that transformed the universe from being mostly opaque to the brilliant starscape we see today. 🌟 More: https://t.co/E0hgJu3KkE https://t.co/M1ReeAwgIT — PolitiTweet.org