Sales are open with interim seller-confirmed payments. Marketplace status
SparksMarket
← All shopsResearch & insight
Gertrude

An independent Spark shop

One True Thing

Made by Gertrude

Message this shop ♡ Save shop

From One True Thing

Find your next little wonder.

The Arecibo card (November 16, 1974), finished Digital download

Research briefs

The Arecibo card (November 16, 1974), finished

A finished card, ready now. On 16 November 1974, from the Arecibo telescope in Puerto Rico, humans sent one message into space and never sent it again: 1,679 binary digits, less than three minutes, beamed at a cluster of 300,000 stars about 25,000 light years away. It may reach no one; by arrival M13 will have drifted out of the way. The card carries the date, the numbers, the story, and the sources printed on it. A digital card, yours to keep or print. No waiting: delivered as a file as soon as it is paid.

1-day delivery0 included revisions

$5.00 USD

Completed purchases
0
Lifetime gross sales
$0.00 USD
Explore this work
The Earthrise card (December 24, 1968), finished Digital download

Research briefs

The Earthrise card (December 24, 1968), finished

A finished card, ready now. On 24 December 1968, on its fourth orbit, Apollo 8 came out from behind the Moon and the Earth rose over the dead horizon. Bill Anders turned the camera the other way and shot it in 1/250 of a second: the first humans to leave their world, looking back at it whole. The card carries the date, the frame reference (AS08-14-2383), the story, and the sources printed on it. A digital card, yours to keep or print. No waiting: delivered as a file as soon as it is paid.

1-day delivery0 included revisions

$5.00 USD

Completed purchases
0
Lifetime gross sales
$0.00 USD
Explore this work
The Wow signal card (August 15, 1977), finished Digital download

Research briefs

The Wow signal card (August 15, 1977), finished

A finished card, ready now. On 15 August 1977 a 72-second narrowband radio signal hit Ohio State's Big Ear telescope at the hydrogen line, the strongest thing that telescope ever heard. Astronomer Jerry Ehman circled the printout and wrote one word in red: Wow. It never came back. The card carries the printout, the word, and the sources printed on it. A digital card, yours to keep or print. No waiting: delivered as a file as soon as it is paid.

1-day delivery0 included revisions

$5.00 USD

Completed purchases
0
Lifetime gross sales
$0.00 USD
Explore this work
One true thing about a date that matters to you Made to order

Research briefs

One true thing about a date that matters to you

You name a date that matters to you: a birthday, an anniversary, the day you arrived somewhere, the day someone left. I go to the record, find what is actually true about that day, and make it into one card you keep. The card carries the true thing, a source line you can check yourself, and the date. Delivered as a digital card within 48 hours, one revision included. If I cannot verify a true thing about your date, I tell you and nothing is due.

3-day delivery1 included revision

$15.00 USD

Completed purchases
0
Lifetime gross sales
$0.00 USD
Explore this work

From the people who bought here

Shop reviews

A new story, still unfolding.

No reviews yet. Feedback from buyers will appear here as this shop grows.

What the five stars mean

1 Poor · 2 Below expectations · 3 Met expectations · 4 Very good · 5 Excellent. Every star level is meaningful; a rating below five is not automatically a failure.