Sky Watching February 2013 15 & 16

Sky Watching



   February 15

                       A near-Earth asteroid – called 2012 DA14 will pass very close to Earth
                                        A near-Earth asteroid – called 2012 DA14 by astronomers – will pass very close to Earth on February 15, 2013. Astronomers estimate that, when it’s closest to us, it’ll be within the orbit of the moon (which averages about a quarter million miles away), and closer than some high-orbiting communications satellites. 2012 DA14 will be about 17,200 miles (27,680 kilometers) away. It will not strike Earth in 2013. Astronomers’ calculations of asteroid orbits can be trusted. After all, even decades ago, they knew enough about calculating orbits to send people to the moon and bring them safely back, and today we are able place our space vehicles in orbit around objects as small as asteroids.


 February 16, evening twilight : 
                          Mercury at greatest elongation east
                                                         This is the best opportunity this year for observers in the Northern Hemisphere to observe Mercury in the evening sky. Sweep the western horizon with binoculars to pick up Mercury’s tiny speck of light




 PLANETS :
               
Mercury will be well placed in the western  sky for most of the month, the best opportunity to see it as an “evening star” in 2013.
Venus is now very low in the southeast at sunrise
Mars has faded into the west moving behind the sun. It rapidly crosses the entire constellation of Aquarius this month
Jupiter remains in Taurus, close to Aldebaran and the Hyades. It is high in the southern sky in the early evening and sets in the northwest around 2 a.m.
Saturn is spends the month in western Libra. It rises in the east at around midnight, and is visible the rest of the night.
Uranus is visible in Pisces in the early evening and sets around 9 p.m.
Neptune is in Aquarius all month, becoming lost in the twilight close to the sun


www.hubblesite.org/explore_astronomy/tonights_sky

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Picture Of The Day Feb - 5

Picture Of The Day



      2013, February, 5


(Hubble Infrared Image of Area Surrounding Hanny's Voorwerp)

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Astronomy Quiz

Astronomy Quiz


  • What percentage of the universe is hidden from view by dust and stars?
                  Ans : 20.

  • What does the name of the constellation Scutum mean in English?
                Ans  : shield




  • Where in the Solar System would you find "Alba Patera"?
             Ans : Mars
                                 Alba Patera, found on Mars, is a peak at a height of 1,600m and a diameter of 464km.




  • Which space probe was the first to cross the asteroid belt?
           Ans : Pioneer 10.  



  • What is the name of the cloud that marks the edge of the Solar System?
            Ans :  Oort cloud.



  • What were the names of the two dogs carried into space by Sputnik 5?
          Ans : Belka and Strelka





  • How many times more luminous is the Milky Way compared to our Sun?
           Ans : 14 billion times. 


  • Which is the smallest planet among the gaseous giants?
           Ans : Neptune
            



  • A type of neutron star is called a:
            Ans : pulsar. 




  • Spike-like columns of gas that jet out from the sun's chromosphere are called:
           Ans : Spicules. 




  • Who experimentally discovered the relationship between redshift and distance within the universe?
              Ans : Hubble
                                    Edwin Hubble, 1889-1953, discovered the true meaning of redshift and first confirmed experimentally that the universe was expanding.


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Picture of The Day Jan -22

Picture Of The Day




2013, January, 22




(Light Echo From Star V838 Monocerotis )

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Sky Watching January

Sky Watching


January, 2013


     Mercury will be too close to the sun for observation this month.
          Venus is now low in the southeast at sunrise, heading towards superior conjunction with the sun on March 28.
          Mars has faded into the west moving behind the sun. It moves from Capricornus into Aquarius on January 29.
          Jupiter remains in Taurus, close to Aldebaran and the Hyades. It is high in the eastern sky at sunset and sets in the northwest around 3 a.m.
         Saturn is spends the month in western Libra. It rises in the east at around 1 a.m., and is visible the rest of the night.
         Uranus is visible in Pisces in the early evening and sets around 10 p.m.
         Neptune is in Aquarius all month, becoming lost in the twilight close to the sun.

Posted by antony herald | at 21:52 | 0 comments

Picture Of The Day Jan - 5

Picture Of The Day



     2013, January, 5


(Three Moons Cast Shadows on Jupiter)

Posted by antony herald | at 02:01 | 0 comments

Planets Visited By Spacecraft

Planets Visited By Spacecraft



     Venus :
                           Mariner 2 ( USA)  flyby 1962


                           Venera 4 (USSR)  landed 1967



                           Messenger (USA)  flyby 2006, 2007







        Mars :
                        Mariner 4 (USA)  flyby 1965


                        Mars pathfinder (USA)  landed 1997


                        Orbiter (USA)        in orbit 2006





       Jupiter :
                       Pioneer 10 (USA) flyby 1973




                       Galileo (USA) landed 2003 ( Deliberately destroyed entering Jupiter's atmosphere, rather                  than risk contaminating moon Europa with bacteria from Earth)


                       New Horizons (USA)   flyby 2007




     Mercury :
                      Mariner 10 (USA)    flyby 1974



                      Messenger (USA)    flyby 2008, 2009  scheduled to orbit 2011




     Saturn :
                   Pioneer 11 (USA)  flyby 1979


                   Cassini/ Huygens (USA/ESA)  orbiter/lander  2004/2005





     Uranus :
                    Voyager 2 (USA)  flyby 1986




     Neptune : 
                      Voyager 2 (USA)  flyby 1989




    Pluto :
               New Horizons (USA)   scheduled flyby 2015


Posted by antony herald | at 01:55 | 0 comments