So Much Science, So Little Time

I hope everyone enjoyed their Father's Day weekend, I know I had some good times with my family. There has been some great astronomy stuff happening (as always) so I figured I'll dump some links.

This hemispheric view of Venus was created using more than a decade of radar investigations culminating in the 1990-1994 Magellan mission, and is centered on the planet's North Pole. This composite image was processed to improve contrast and to emphasize small features, and was color-coded to represent elevation. Image Credit: NASA/JPL/USGS

First up, Life's Little Mysteries is presenting The Greatest Mysteries of the Cosmos every Friday this summer. They are starting with our solar systems and first was The Greatest Mysteries of Venus. It is a great opener to understanding out planetary evil twin.

Dawn captured this view of Vesta on June 14, 2011. Credit: NASA / JPL-Caltech / UCLA / MPS / DLR / IDA

NASA's Dawn spacecraft is getting closer and closer to asteroid Vesta by the day. It now has a better resolution than the Hubble Space Telescope. The image above was taken on June 14, 2011 from a distance of about 265,000 kilometers. Each pixel spans roughly 25 kilometers. As The Planetary Society explains it:

There's clearly a deep crater in the northern part of the image. And the outline is definitely lumpier than the outlines of similarly sized bodies in the outer solar system (like Mimas and Enceladus), but we knew that already; the rock that Vesta is made of is able to hold up steeper mountains than the relatively low-strength ices that outer planet moons are made of. Apart from that, it's still hard to tell what's albedo differences and what's topography. But that won't be true for long.

In the skies of Mars, there was recently an amazing alignment. On June 1, Mars' tiny moon Phobos slipped in front of Jupiter from the view point of the ESA’s Mars Express orbiter. Above is an animation of the event, using photos taken with the Mars Express’ High Resolution Stereo Camera (HRSC). In addition to being a cool event, the observation also helps to improve knowledge of the martian moon's orbital position.

Color composite of Helene from June 18, 2011 flyby. There’s a bit of a blur because the moon shifted position in the frames slightly between images. NASA / JPL / SSI / J. Major

And speaking of tiny moons, the Cassini spacecraft out at Saturn performed a flyby of Helene on June 18. The second-closest flyby of the icy little moon helped to map the surface and better understand the history and gully-like features seen on previous flybys. You can read more about it here.

In other news, the Space Shuttle Atlantis had its final payload delivered on Saturday, June 18. The shuttle is on track for the final flight, STS-135, on July 8. The main payload is the Italian- built “Raffaello” logistics module for the International Space Station, which contains 5 tons of "critical space parts, crew supplies and experiments to sustain space station operations once the shuttles are retired". The secondary payload is dubbed the Robotic Refueling Mission (RRM) – a sort of “gas station in space”.

And finally, tomorrow, June 21, is the longest day of the year for the northern hemisphere, the summer solstice. Hopefully everyone enjoys their long and warm day. Though consequently, it is the shortest day in the southern hemisphere, so keep warm guys.

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Posted in Cassini,Dawn,Helene,Jupiter,Mars,Moons,Phobos,Saturn,Solstice,Space News,Space Shuttle,Venus,Vesta 21 comments

April 2011 Highlights

We are firmly into spring, even though it doesn't look much like it here, cold and wet still. But, in the northern hemisphere, April brings the promise of warmer weather! There is still the problem of 'April showers,' which can hassle astronomical observations, but hopefully the weather won't interrupt to many events this month. April has been designated Global Astronomy Month by the Astronomers Without Borders, so your local astronomy club might be up to something fun.

This month will see Venus continuing to be bright in the morning sky; and Saturn will rise shortly after sunset, reaching opposition (closest approach to Earth) early in the month, it will be bright. I try to keep this to planets and stuff that you can visually see, so no need for a telescope. Unfortunately, most of the planets are early morning this month. So unless you are an early riser, or really late sleeper, you'll probably miss out.

Here is more you can look forward to:

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Posted in April,Highlights,Meteor Shower,Moon,Planets,Saturn,Venus 20 comments

March 2011 Highlights

March is one of my favorite months, there is spring break, St. Patrick's day, the beginning of spring, and lots of birthdays (mine included). It also is when things start to warm up and more people can tolerate being outdoors at night, a when more people start coming outside to do observing. It isn't as nice as a warm summer's eve, but its getting there. Although if you are in the southern hemisphere the opposite is probably true. Anyways, I wanted to start a new monthly segment that covers some of the astronomical highlights of the coming month. This includes Saturn brightening every night as it nears opposition (closest to the Earth) in early April, and Venus bright in the dawn sky for the whole month.

So here's what else you can look forward to:

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Posted in Astronomy,Equinox,Highlights,Jupiter,March,Mercury,Moon,Venus 20 comments