New Horizons: Countdown to Pluto

Nasa’s New Horizons mission spacecraft is now within two days journey time to the dwarf planet Pluto and its complex system of 5 moons.  [Image credit: NASA, ESA, and M. Showalter (SETI Institute)]   Travelling at 14km/s, New Horizons’ swift fly-by of the dwarf planet is scheduled to take place on Tuesday 14 July, at exactly 11:49:59 GMT (12:49:59 BST; 07:49:59 EDT), when it will be a mere 12,500km from the surface. At a distance of 4.7 billion km, New …

Read more…

Clearing the cosmic fog

As the BBC noted, astronomers using ESO’s Very Large Telescope [VLT] have confirmed that galaxy UDFy-38135539, one of several candidates identified in the Hubble Ultra Deep Field (UDF) image of the Fornax Constellation acquired with the telescope’s new Wide Field Camera 3 last year, is the most distant galaxy ever detected. [Image credit: NASA, ESA, G. Illingworth (UCO/Lick Observatory and University of California, Santa Cruz) and the HUDF09 Team] Spectroscopic analysis of data collected during a 16 hour observation using the VLT identified a red shift …

Read more…

“on the timescales involved in this event, we’re really catching it in the moment of happening”

When the comet-like asteroid P/2010 A2 was identified as a suspected asteroid-asteroid collision in January this year it was the first such collision caught “in the act”.  Images Credit: NASA, ESA, and D. Jewitt (UCLA). As the BBC notes, subsequent observations by the Hubble Space Telescope and the Rosetta probe suggest that the collision probably occurred in early 2009. Here’s a sequence of Hubble observations from January to May 2010, with scale. As the associated text explains The asteroid debris, dubbed P/2010 A2, appears to be …

Read more…

Raise a glass to Hubble!

On the 24th April 1990 the Hubble Space Telescope was launched from the Kennedy Space Center and to mark the orbiting observatory’s 20th anniversary they’ve released this suitably stunning image – there’s a Hubblecast video outlining the telescope’s history here. And the BBC have put together a wondrous Hubble 20th anniversary audio-slideshow with Professor Alec Boksenberg. Hubblecast gets in on the act with a tribute to the telescope’s discoveries in those 20 years. And here’s an approximated 3-D view into a giant …

Read more…