Monday July 6th at 10 UT (5 am CDT) the Dwarf Planet Pluto will be at opposition. All outer planets and other solar system objects that orbit the Sun beyond the orbit of the Earth have opposition. At that orbital position the Earth is between the Sun and the outer solar system object, much like the Sun-Earth-Moon arrangement for a full Moon. At opposition the outer solar system object rises at the local time for sunset and sets at the local time for sunrise – again just like the full Moon.
Where is Pluto and is Pluto visible to the naked eye? Pluto currently is above the teapot-shaped asterism for Sagittarius the Archer. It is located near a 3rd magnitude star, Xi2 Sagittarii, however Pluto has an apparent magnitude of 14.0 making it too dim to be seen in other than a large telescope or with time exposure images.
Click here to learn more about the New Horizons mission and take part in the mission with some of the interactives created by NASA.
Click here to go to the Qué tal in the Current Skies web site for more observing information for this month.
During Spring in the northern hemisphere, the seven bright stars that form the Big Dipper are easily seen high over the northern horizon. Located at the hindquarters of the Great Bear (Ursa Major), this asterism (group of stars) has long been used as a celestial guide by travelers. During the American Civil War, slaves memorized a song called “
Pulsars earn their name from the radio waves they emit, which we receive in regular pulses. Pulsars emit radio waves as a narrow beam, much like the beam of light emitted from a lighthouse. Just as direct light from a lighthouse sweeps past a point regularly, so does the beam of radio waves emitted from a pulsar. PSR 1257+ 12 emits radio waves that reach the Earth with at an interval of 6.2 milliseconds. Because we receive pulsed radio waves from a pulsar as a result of its rotation, we know a pulsar’s pulse interval coincides with its period of rotation. This means that PSR 1257 + 12 rotates every 6.2 milliseconds!
Exo-solar systems and their planets have been detected through various methods with the greater majority of these exo-solar systems being discovered by the 
Download a series of monthly star maps and data pages. Each monthly star map shows the location of many of the stars we know or are reasonably certain that are stars with their own planets. Click 
Thursday February 26th the outer planet Neptune reaches a point in its orbit where it passes behind the Sun as we view this from Earth. Neptune, and the other outer planets, dwarf planets, or small solar system bodies, all eventually reach this position on the opposite side of the Sun known as 
On Tuesday 1 April the position of the planet Jupiter with respect to the Earth and the Sun places the solar system’s largest planet at an orbital position called eastern quadrature. Jupiter is at a 90 degree angle from the Earth as this graphic shows. Think first quarter Moon as that is a fair comparison of the relative positions. At this position Jupiter follows the Sun across the sky from east to west as the Earth is rotating, meaning that Jupiter rises after the Sun and consequently sets after the Sun.
The only other place in the solar system that has liquid on its surface is Saturn’s moon Titan. However the liquid in the lakes on the moon Titan are not water as the temperatures on the surface average around -180o C (-292oF). Instead the liquid that falls as precipitation is in the form of methane, ethane, and other hydrocarbons. On Titan there is a cycle of evaporation, condensation, and precipitation that is reminiscent of the water or hydrologic cycle on our planet. Most of the liquids on Titan are found in the northern hemisphere.
Here is a neat 3-D paper model of the path Comet ISON follows as it makes its way through the inner solar system. Follow the comet from its inbound approach and perihelion through part of its outbound path as it leaves the inner solar system. 
