... Kepler's Laws . ... Second Law . 12a. More on 2nd Law . ... Kepler's 2nd law prescribes the way the velocity V of an object orbiting a single center varies around its orbit: . The rate at which the line to the center ("radius vector") covers area does not change around the orbit." As noted in section #12 , this means that the object's velocity V increases when its distance r decreases, and vice versa. ... Because by Kepler's 2nd law, the Earth moves in its orbit a little faster in winter. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . The distance of the Sun from Earth is the basic unit of all astronomical distances. ... The 18th century transits of Venus allowed a proper geometrical determination of this unit to be made for the first time. ... One of the most famous of these problems is the black drop effect. ... They calculated the mean distance to the Sun to be 95 million miles whereas the currently accepted value is close to 93 million miles. ...

... The greater the distance, the smaller the parallax. ... That triangle has the same proportions as the much larger triangle ABC, and therefore, if the distance B'C to the thumb is 10 times the distance A'B' between the eyes, the distance AC to the far landmark is also 10 times the distance AB. ... The most distant objects our eyes can see are the stars, and they are very far indeed: light which moves at 300,000 kilometers (186,000 miles) per second, would take years, often many years, to reach them. ...

Astronomy Picture of the Day . Close To Eros . ... 27.10.2000 . ... Credit: NEAR Project , JHU APL , NASA Explanation: Scroll right and fly close over asteroid Eros! ... The car-sized Near Shoemaker spacecraft is now on its way to a higher, more stable orbit about 200 kilometers above asteroid Eros . ... October 2000 . ... 1999 2000 . ... Publications with keywords: 433 Eros - asteroid . Publications with words: 433 Eros - asteroid . ... Asteroid and Galaxy . ... 1999 JM8: A Rock Too Close . ...

. General Information . Media Files . Participants . Timetable . Local Information . Photos . Dear Participants! . We would like to thank everybody for coming and we hope that conference was fruitful for you. According to decision that was taken during discussion on the first day of the conference all presentations will be published on this website in section Media Files (with references from timetable) starting with summary of conference by Marc Sarazin.

... 2015 January 29 . Close Encounter with M44 . ... Explanation: On Monday, January 26, well-tracked asteroid 2004 BL86 made its closest approach, a mere 1.2 million kilometers from our fair planet. ... The remarkably pretty telescopic field of view includes M44, also known as the Beehive or Praesepe star cluster in Cancer. Of course, its close encounter with M44 is only an apparent one, with the cluster nearly along the same line-of-sight to the near-earth asteroid. ... About APOD | ...