According to the account of creation as described in the book of Genesis in the Old Testament, on the second day God created a firmament to divide heaven from earth. You can find more information here: http://www.fordham.edu/halsall/ancient...
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Gen 1:6 And God said, Let there be an expanse in the middle of the waters, and let it divide the waters from the waters. Gen 1:7 And God made the expanse, and divided the waters which were under the expanse from the waters which were above ...
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Genesis 1:6-8 This has been interpreted as 'sky' or 'space'.
http://wiki.answers.com/Q/What_did_God_create_on_the_se...
On the second day God created the sky around the earth which we call the atmosphere. ... No! God the Creator is never hungry and is in need of nothing! Why, then, did God create the trees? The Scriptures show us that, God, in His goodness, created everything for man, whom He planned to create on the sixth day.
www.injil.org/TWOR/04.html
This is the second time the Catechism holds the Law of God before us. In Lord's Day 2 we saw that the knowledge of our misery was discovered in the Law. Here, ... What did God create on the second day? God created the firmament, or, the sky. ... What did God create on the fourth day? The sun, the moon, and the stars.
www.prca.org/cat_sample.html
For on the second day of Creation, God made an expanse to divide “the waters from the waters.” Apparently, these “waters” already were present on day two when the expanse (atmosphere) was made. In fact, that is exactly what Genesis 1:1-2 teaches: “In the beginning God created ... What Did God Create on Day One?
www.apologeticspress.org/articles/1644
Apologetics Press, Inc. ... For on the second day of Creation, God made an expanse to divide “the waters from the waters” (Genesis 1:6). Apparently, these “waters” already were present on day two when the expanse (atmosphere) was made. ... What Did God Create On the First Day of Creation? by Eric Lyons, M.Min. [Español];
www.apologeticspress.org/articles/152
Weekly bible study in Genesis, Exodus. ...   2. What did God create on the first day?   3. What did God do on the second day?   4. What did God create on the third day?   5. What did God create on the fourth day?   6. What did God create on the fifth day?
www.design-max.net/Exam1.html
Did God Create Carnivores on Day 6? ... 'In the second month on the fourteenth, day [yom] at twilight [ereb], they shall observe it; they shall eat it with unleavened bread and bitter herbs. (Numbers 9:11)
www.godandscience.org/youngearth/sixdays.html www.godandscience.org/youngearth/sixdays.html
Cosmologists believe that this theory will one day be replaced by a cosmology based on a quantum theory of gravity and, ... If God intends to create a universe that will eventually contain living beings, then there is no reason for him to begin the universe with a completely unpredictable singularity. In fact,
www.infidels.org/library/modern/quentin_smith/bigbang.h... www.infidels.org/library/modern/quentin_smith/bigbang.html