Venus will reach perihelion – its closest point to the sun in its orbit – on November 29, 2015. Venus’ orbit is the closest to being circular of all the planets in our solar system. Its distance from the sun only varies by only about 1.5% between perihelion and aphelion (farthest point from the sun). Venus is well known for its 8-year cycles. This planet – which orbits the sun one step inward from Earth – swings to perihelion 13 times every 8 years. So Venus’ 13th return to perihelion will happen some 8 years from now – on November 28, 2023 – with Venus and Spica returning to virtually the same spot in the November 2023 morning sky.
Venus returns to perihelion 13 times in 8 years:
1. 2016 July 10
2. 2017 Feb 20
3. 2017 Oct 3
4. 2018 May 16
5. 2018 Dec 26
6. 2019 Aug 8
7. 2020 Mar 20
8. 2020 Oct 30
9. 2021 Jun 12
10. 2022 Jan 23
11. 2022 Sep 4
12. 2023 Apr 17
13. 2023 Nov 28 link: earthsky. org
沒有留言:
張貼留言