perihelion

1 In 1989, Pluto reached perihelion—the closest point to the sun in its elliptical orbit.

2 The orientation of a typical comet tail changes as the comet passes perihelion.

3 Suppose a comet were discovered approaching the Sun, one whose orbit would cause it to collide with Earth 20 months later, after perihelion passage.

4 The relativistic advance of perihelion was later also observed in the orbits of several asteroids that come close to the Sun.

5 It goes around the Sun on a "very elongated orbit and never comes closer to the Sun, a point called perihelion, than about 65 AU," the researchers said in the statement.

6 According to Marsden's calculations, this comet reaches its closest point to the Sun (perihelion) on March 18th.

根据Marsden的计算，这颗彗星会在3月18日过近日点。

7 “It gets very granular,” he says, but explains it anyway: every planet wobbles on its axis like a spinning top, a phenomenon called the precession of perihelion.

8 The mission is approaching its 19th perihelion on March 30, 2024 at a distance of 11.5 solar radii from Sun center.

9 However, the team is still hoping that Philae could not only wake up, but provide a ringside seat for the perihelion with its array of scientific instruments.

10 It will reach its first perihelion, or point closest to the Sun, at about 10:28 p.m.

11 A perihelion of circa 140 AU would demand something weighty—something perhaps like Planet X or Planet Nine—had somehow wrested FarFarOut from the grip of Neptune’s gravity.

12 Its closest approach to the Sun, called perihelion, will occur on May 27.

13 The close pass, known as a perihelion, puts the probe between the orbits of Venus and Mercury.

14 Next month marks perihelion, when 67P makes its closest approach to our star, before then sweeping back out into the outer Solar System.

15 They found that the closest it ever gets to the Sun — a measure known as its perihelion — is 80 AU, beyond the bulk of the Kuiper belt.

16 And gas jets are becoming more intense as the comet approaches the Sun - with its closest approach, known as perihelion, coming up shortly on 13 August.

17 The overall illumination conditions could improve for another couple months, as comet 67P approaches perihelion on 13 August, the closest point in its orbit around the sun.

18 Jet production is only expected to increase in the coming weeks as Comet 67P moves towards perihelion – the closest it gets to our star in its looping journey through the Solar System.

19 As they approach perihelion, the comets speed up and whip through the inner parts of their orbits more rapidly.

20 The pictures showcased on Thursday come from the most recent near pass, known as perihelion.

1 极点

climactic end full head maximum pitch sum pole summit climax sublime pinnacle culmination zenith apogee acme apotheosis sublimity be-all ne plus ultra

2 最高点

maximum peak solstice apogee noontide

3 近日点

apsidal apsis