Reletter
Artwork for Ill-Defined Space

Ill-Defined Space

John Holst

Analyzing the activities, business, and outcomes of the space sector (and more).

Platform
Substack
PricingOnly free issuesPublishesWeekly
Issues266Founded6 years agoLast Issue5 months ago
Active

Read this Newsletter

illdefinedspace.substack.com
Artwork for Ill-Defined Space

Latest Issues

The Ill-Defined Space Global Orbital Launch Summary: 2025

FYI, there will be no spacecraft analysis following this Launch Summary. Also, so there’s no confusion, this is my work. It is not sponsored by anyone or organization, such as the UK government, who I work for.

Happy New Year!!

There’s no...

5 months ago
5
2

Wither, European Launch?

Three for the Price of One

While working at Florida’s Space Coast during the past few days, it’s hard not to notice launches happening at literally all hours of the day. I was there to support the launch of the IMAP (Interstellar Mappin...

8 months ago
3

2025 Space Industry Observations and an Update

It’s time for me to end my newsletter writing.

At least, my weekly writing (I may write something now and then). So, if you are a paying Ill-Defined Space subscriber, first–Thank You! And then, I recommend canceling your subscription. In f...

a year ago
6

Cubesat Customers–The Worst of Both Worlds?

I’m a fan of cubesats.

There, I said it.

Cubesats are great little satellites and equalizers for those wishing to learn about and operate in space. They are a subset of the small satellites the industry has increasingly employed, based on...

a year ago
2

Making Life Better? 2024 Communications and Remote Sensing

This is another two-parter, with this part being part 1, which is a general scan of some of the communications and remote sensing satellites and services deployed during 2024.

In part 2 of 2024’s “The Ill-Defined Space Spacecraft Market an...

a year ago
2

Key Facts

Contact Information
Newsletter Author
Number of Subscribers
Find out how many people subscribe to this newsletter.

Audience Metrics

Subscribers, engagement, traffic and sponsorship for Ill-Defined Space.

SubscribersMonthly Web VisitsAccepts Sponsors
Estimated Cost per Ad

Authors

The writers behind this newsletter.

  • John Holst

    Space Industry Researcher/Site Owner

  • Frequently Asked Questions

    How can I access the email archive for Ill-Defined Space?

    You can find recent issues that have been published by Ill-Defined Space on Reletter by scrolling up to where it says Latest Issues. Tap on the link for any of the most recent emails or hit More Issues to see older ones.

    How many subscribers does Ill-Defined Space have?

    To see how many people subscribe to Ill-Defined Space, simply upgrade your Reletter account. We provide readership numbers and lots of other stats for this newsletter so you can decide if it's worth reaching out to.

    How can I advertise in Ill-Defined Space?

    Newsletter advertising can be extremely effective when it's done right. Before you pitch Ill-Defined Space as a potential sponsor or partner, make sure that you've done your research and checked its newsletter stats with Reletter.

    Then, personalize one of our winning pitching templates and send it to the right person using the contact info provided.

    How much does it cost to sponsor a publication like Ill-Defined Space?

    Newsletter ad rates (or CPM) vary depending on many factors, including industry, number of subscribers, open rate, ad placement and more.

    To find out how much an ad will cost, contact Ill-Defined Space using the contact information provided and ask for a copy of their media kit.

    How can I find newsletters related to Ill-Defined Space?

    Scroll up to where it says Related Newsletters to see other publications like Ill-Defined Space. You can also search our email newsletter directory to discover other newsletters that cover the topics you're interested in.

    How do I contact Ill-Defined Space?

    Reletter provides this newsletter's website URL above, where you will often find their contact information. We also provide links to associated social media accounts and pitching templates so you can reach out fast.