Radio Telescope Repair

Radio telescope nose with cracked plastic structure
Proceed with caution.

After enough years of outdoor UV exposure, temperature fluctuations, and who knows what all else, most plastics start to break down. The thin support ring – looks like polyethylene of some sort – has started to crumble, and the radio telescope’s nose cone is hanging loosely.

Interior electronics of radio telescope.
Still working!

Inside, the receiver and amplifier appear to be in good enough shape. Note that many birds and many bugs have made a real mess of things.

Bird's nest filling nose cone.
Not suitable for single-stream recycling.

And they’ve built an astounding nest inside. Dried grass, last year’s hydrangea blooms, torn bits of plastic bags, some shredded paper, a few ripped-up bits of surgical masks. Removing all of this did not endear us to the starlings.

Machined aluminum brackets with screws
Measure twice, mill once.

The plastic solution worked for a while, but it’s time to up our game. Aluminum brackets, precisely machined out of solid blocks, drilled and tapped for stainless steel hardware. Bright and shiny and destined to be hidden away from view.

Radio telescope with restored nose cone, gaps sealed with duct tape.
Duct tape buys time.

And then, with summery Pennsylvania weather on the horizon (read: thunderstorms), we seal the whole mess up with duct tape. Maybe it’ll deter the birds until we can deal with the rest of it some fall.

The most amazing part is that we didn’t end up using hot glue.

Small Radio Telescope

Satellite dish radio telescope viewed through window
Ah, daytime astronomy.

At the Observatory, we have a well-loved Small Radio Telescope, an older version of the one available from MIT’s Haystack Observatory. It’s an educational tool, suitable for undergraduates, which offers one charming advantage over our other, visual telescopes:

You can operate it comfortably from the climate-controlled building interior, conducting your radio observations in almost any weather.

Spaghetti

Tangled plastic threads
Do not eat.

Not the noodles, served with red sauce and meatballs. Not the Westerns. Not the squash. Not the -fication process of stretchy weirdness when one falls toward a black hole.

When the 3D printer makes a mistake, it doesn’t realize that anything is amiss. It just keeps on moving, extruding, dutifully squirting out warm plastic which twists and tangles into a sad little mess. PLA spaghetti.

News Release: Oldest Moon Rock

Press release: Oldest Moon Rock
“Lemon-sized.”

Size descriptions for popular media: either described in terms of fruit or of sporting goods.

Ballpark identification of a rock at 4.6 billion years old – approximately the age of the solar system – is pretty darn cool. Even if there’s nothing lemony about it.

Slide Projector

Slide projector, no carousel
The classic.

Remember slide film? Carousels and projectors and hauling out the big screen to see those vacation photos? Are you old enough to remember high school and/or college lectures on slides? The shop techs remember.

Nowadays everyone’s much more likely to use Slides than slides, of course. More portable, for the most part. Easier to edit, up until the last moment. Overall, a lot of advantages. But the old-school ones were pretty cool, too.

One can only hope that back in the days of the Audio-Visual Aids Department (we’re assuming they’ve been subsumed into L&IT, but not ruling out the possibility of a now-defunct academic department), they wheeled these – and film projectors, and VCRs, and hopefully LaserDiscs, too – into your classroom space on the classic steel cart. Embedded YouTube clips just aren’t the same.

News Release: Parasol-Popping

"Parasol-Popping" Experiment Set press release
Umbrella-assisted descent: Mary Poppins, Oswald Cobblepot, NASA.

Parachutes, air bags, sky cranes: there are many options for attempting to (safely) land a probe on Mars, and some of them have even worked! Unclear at this time what became of this particular parasol plan.

Science, supported via 2x4s and plywood.

Popping: interesting word choice for something that big, something intended to do the opposite of crashings and smashings.

As strange as this interplanetary toadstool looks, one can only hope it worked. Or looked spectacular when it didn’t.

Post Holder

Old optics rail post holder, dated 1-29-09
A Cenco classic

It can be a real pleasure to find old objects lying around, with their dates of acquisition marked on the side. January 29th, ’09!

Which ’09, exactly?

Yup, still in Olin 269

Olin Science Building was constructed in 1954, so it’s doubtful this particular post holder dates back to 1909. Especially as the lettering on both sides matches up.

So we were still purchasing equipment for the old, cast-iron optics rails as recently as 15 years ago? Wow.