... Planets . ... Earth Satellites . ... The newly discovered ?mega-Earth? ... Its sibling, the lava world Kepler-10b, is in the background (the two planets? proximity is grossly exaggerated) .€а Kepler-10c has a diameter of about 29 000 km, 2.3 times as large as Earth, and weighs 17 times as much. ... The first mega-earth to be discovered is Kepler-10c which orbits a star lying about 560 light years from the Sun in the constellation Draco. ... Astronomers Find a New Type of Planet: The ?Mega-Earth? ...

... Science . ... PPTA timeline . Internal . ... Data release 2 discussion . Editing this wiki . ... Prep . Hobbs et al. (submitted), "TEMPO2 III" . Journal: MNRAS . Co-authors: Jenet, Lee, Verbiest, Yardley, Manchester, Lommen, Coles, Edwards & Shettigara . Science content: summary of simulating GW signals in tempo2 . ... Science content: Summary of the PULSE@Parkes project including description that some observations will be useful for the PPTA. ... Data content: PPTA datasets . ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

Astronomy Picture of the Day . Unexpected Impact on Jupiter . ... 8.09.2009 . ... First discovered by an amateur astronomer Anthony Wesley on 2009 July 19, the impact was quickly confirmed and even imaged by the Hubble Space Telescope the very next day. ... It is now thought that a small comet -- perhaps less than one kilometer across -- impacted Jupiter on or before 2009 July 19. ... July . ... Publications with keywords: Jupiter - impact . Publications with words: Jupiter - impact . ...

Estimating the NEO Population and Impact Risk: Past, Present and Future . ... The detailed analyses of the 2003 NASA SDT report estimated a "persons affected" rate of ~182 per year associated with impact tsunami. ... Here we re-evaluate the impact hazard, using our new population and completion estimates, and revised "kill curves" including the airburst damage down to smaller size and lower tsunami fatality rate. ...