The Cordillera Central ("Central mountain chain") is in the southern part of the province, and the Sierra Samba (or Sierra Zamba), a chain of low hills, runs across the northern half.
The main rivers are Guayubín and Mao, both tributaries of the Yaque del Norte river.
The climate of the province is a tropical climate, hot most of the year, but it is cooler in the mountains.
There are 3 municipalities and none municipal districts (M.D.) in the province.
The only economic activity of importance is farming.
S/2003 J 5
It belongs to the Carme group, made up of non-spherical retrograde moons orbiting Jupiter at a distance ranging between 23,000,000 and 24,000,000 km and at an inclination of about 165°.
Magnolia (tree)
Magnolia is a genus of 210 species. The Angiosperm taxonomical names "Magnoliophyta" (division) and "Magnoliopsida" (class) come from this genus. Charles Plumier gave a flowering tree from the island of Martinique the genus name "Magnolia", after French botanist Pier Magnol.
Many magnolias that have pretty flowers are used as street trees.
S/2003 J 4
It belongs to the Pasiphaë group, non-spherical retrograde moons orbiting Jupiter at distances ranging between 22,800,000 and 24,100,000 km, and with inclinations ranging between 144.5° and 158.3°.
Mikoyan-Gurevich MiG-19
The MiG-19 Farmer was a Soviet fighter aircraft made by Mikoyan. It first flew in 1953 and was introduced in 1955. It was meant to replace the older MiG-17 Fresco. During the Vietnam War, it was used a little by the North Vietnamese but not as much as the MiG-17 or MiG 21 Fishbed.
It had 3 30mm cannon, and could carry 4 bombsor rockets. It weighed 11,397 pounds (5,170 kilograms) empty and could weigh up to 19,621 pounds (8,900 kilograms) at the heaviest. It was powered by 2 Tumansky RD-9 jet engines, each had 7,165 pounds (3250 kilograms) of thrust with afterburner. It was 12 feet (3.6576 meters) high, had a wingspan of 29.5 feet (9 meters), and was 42 feet 11 in (13.1 meters) long. It could go 903 miles per hour (1,450 kilometers per hour), and was the first supersonic Soviet fighter.
Eventually, it was replaced by the newer MiG-21.
Camille Flammarion
Nicolas Camille Flammarion (February 26, 1842 – June 3, 1925) was a French astronomer and writer. He was usually credited as Camille Flammarion.
Herse (moon)
Herse is a moon of Jupiter. It was found by a team of astronomers led by Brett J. Gladman, "et al." in 2003 and called until 2009.
Herse is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 22,134,000 km in 672.752 days, at an inclination of 162° to the ecliptic (161° to Jupiter's equator), with an orbital eccentricity of 0.2379.
It is the closest member of the Carme group, made up of non-spherical retrograde moons orbiting Jupiter at a distance ranging between 23,000,000 and 24,000,000 km and at an inclination of about 165°.
Johann Gottfried Galle
Johann Gottfried Galle (9 June 1812 in Radis, Saxony-Anhalt–10 July 1910 in Potsdam, Brandenburg) was a German astronomer at the Berlin Observatory who, with the help of student Heinrich Louis d'Arrest, was the first person to view the planet Neptune, and know what he was looking at. He used the calculations of Urbain Le Verrier to know where to look.
Voyager program
The Voyager program is a space exploration program of the United States' NASA agency. It consists of a pair of unmanned scientific probes, "Voyager 1" and "Voyager 2". They were launched in 1977 to take advantage of a favorable planetary alignment of the late 1970s. Although they were officially used to study just Jupiter and Saturn, the two probes were able to continue their mission into the outer solar system. They have since continued out and exited the solar system. These probes were built at JPL and were funded by NASA.
Both missions have gathered large amounts of data about the gas giants of the solar system, of which little was known before. In addition, the spacecraft paths have been used to place limits on the existence of Planet X, a planet believed by some people to be farther from the Sun than Pluto.
In 2013, NASA announced that Voyager 1 had left the solar system (Heliosphere) on 25 August 2012. It is the first man-made object to enter interstellar space. In 2018, NASA announced that Voyager 2 had reached the heliopause on 5 November of that year. Both of them are now in travelling in the interstellar space.
Neptune Trojan
A Neptune Trojan is an asteroid which is in the same orbit as the planet Neptune.
Their name comes from the Trojan asteroids which have the same orbital period as a planet. As of March 2007, there are six known Neptune Trojans. They lie in the elongated, curved region around the L Lagrangian point 60° ahead of Neptune. The six Neptune Trojans are , 385571 Otrera, , 385695 Clete, and .
The discovery of in a high inclination (>25°) orbit is significant because it suggests a ‘thick’ cloud of Trojans. It is believed that large (radius ≈ 100 km) Neptune Trojans could greatly outnumber the Jupiter Trojans.
The New Horizons spacecraft passed through the L Neptune region in 2014. It was preparing to observe Pluto and did not observe any asteroids there.
Edward Guinan
Edward Guinan is currently a professor in Villanova University's Department of Astronomy and Astrophysics. He and two colleagues discovered Neptune's ring system.
Occultation
An occultation is an event that occurs when one object is hidden by another object that passes between it and the observer. A planet, for example, can pass in front of a star. Some occultations are eclipses. The word is often used in astronomy. It can also be used in a non-astronomical sense to describe when an object in the foreground "occults" (covers up) objects in the background.
Flattening
The flattening, ellipticity, or oblateness of an oblate spheroid is the "squashing" of the spheroid's pole, down towards its equator.
Adaptive optics
Adaptive optics is a technology to improve the performance of optical systems by reducing the effects of rapidly changing optical distortion (or deformation). It is commonly used on astronomical telescopes to remove the effects of atmospheric distortion, or astronomical seeing.
Adaptive optical works by measuring the distortion and rapidly compensating for it either using deformable mirrors or material with variable refractive properties. While the technique was theoretically understood for some time, it was only advances in computer technology during the 1990s that finally made the technique practical.
Adaptive optics should not be confused with active optics, which works on a longer timescale to correct the primary mirror geometry itself. The simplest form of adaptive optics is tip-tilt correction, which corresponds to correction of the tilts of the wavefront in two dimensions (equal to correction of the position offsets for the image). This is performed using a rapidly moving tip-tilt mirror which makes small rotations around two of its axes.
A significant fraction of the aberration introduced by the atmosphere can be removed in this way. Tip-tilt mirrors are widely used in night time and solar telescopes, to correct the aberration introduced by Earth's atmosphere on the light path and improve image quality over what would be possible according to the atmospheric seeing.
Tip-tilt mirrors are effectively segmented adaptive optics mirrors having only one segment which can tip and tilt, rather than having an array of multiple segments which can tip and tilt independently.
Optical depth
Optical depth is a measure of transparency. It is defined as the fraction of radiation (or light) that is scattered or absorbed on a path. One way of visualizing optical depth is to think of a fog. The fog between a person and an object that is immediately in front of them has an optical depth of zero. As the object moves away, the optical depth increases until it reaches a large value and the object is no longer visible.
Opacity