The blog editors

Daniel Scuka

Daniel Scuka

Daniel ScukaEJR-Quartz for ESA 
Senior editor for Spacecraft Operations

Originally from Toronto, Canada, Daniel has worked as Web editor at ESOC, ESA’s Space Operations Centre, in Darmstadt, Germany, since 2004. As part of the ESA Web portal team, he reports for ESA’s Human Spaceflight and Operations team and covers activities at ESOC and other ESA establishments. Daniel also edits ESA’s Mars Express and Mars Webcam blogs, and he previously worked on the Columbus and ATV-1 blogs in 2008.


Emily Baldwin

Emily Baldwin

Emily Baldwin, EJR-Quartz for ESA
Space Science Editor

Emily is a space science journalist from the UK, and has been based at ESA’s European Space Research and Technology Centre (ESTEC) in Noordwijk, the Netherlands, since April 2012. She reports for ESA’s Space Science Web portal team covering science stories resulting from ESA’s missions. She has a PhD in planetary science and a keen interest in all things comets and asteroids. She previously blogged for ESA during the 2012 transit of Venus, live from Longyearbyen, Spitsbergen, and is an editor for the Gaia launch campaign blog. For Rosetta coverage she will be writing news for the Space Science Portal, and contributing content to this blog and to ESA’s various social media channels.


Mareike Homfeld

Mareike Homfeld

Mareike Homfeld
Science Communication Officer
Originally from Frankfurt, Germany, Mareike has worked as Science Communication Officer at ESTEC, ESA’s European Space Research and Technology Centre, Noordwijk, the Netherlands, since 2007. As part of the Science Outreach Team she communicates ESA’s scientific projects and latest mission results to the general public and media. Besides the ‘traditional’ PR activities such as preparing brochures, flyers, organising press conferences and web coverage, Mareike is very active on social media such as Twitter and Facebook where she shares space-related topics with the online community. She previously blogged for the launch and docking of ATV Jules Verne in March 2008, the Venus transit in June 2012, and the Gaia launch campaign blog.

Anne-Mareike passed away on 9 March 2017. A dedicated and professional colleague, she is sadly missed.




Claudia Mignone

Claudia Mignone (Vitrociset Belgium for ESA)
Science writer
Originally from Salerno, in the south of Italy, Claudia has worked as a science writer for ESA since 2010. She has a degree in astronomy and a PhD in cosmology and, while she spent many years studying the Universe on the largest scales, she is also fascinated by comets and all we can learn through them. She mostly contributes to the general outreach for Rosetta, writing about the historical and cultural aspects of comets, as well as explaining some of the science that can be done with the mission.



  • Nick says:


    Will you be making a 3D printable file available.???


    • I am trying to prepare a major set of presentation for K-12 students here in the US, trying to ignite a love and passion for science using the rosetta mission. I’d like to coordinate the presentations around the landing date.

      I too need the 3D data so I can get actual models of the comet printed up. I’d like kids to be able to hold this comet in their own hands!

      I see you have stuff for teachers but I didn’t see anything on this mission. If it’s there can you point me to it? I love the cartoon story of the mission and will definitely be using that in the lower grades!

  • Dan Owen says:

    Will you be making a movie of images now that Rosetta is orbiting around the comet nucleus?

  • Dale Huff says:

    I’d like to view the 3D images. I wear prescription glasses that correct for dyplopia (double vision). So I need to get 3D glasses to go over my glasses, but it appears that there are two technologies. Should I get the typical red-cyan glasses, or go for the polarized light version if I want to see your 3D images?


  • Jouni Issakainen says:

    Hi there! You have a wonderful project going on! A small observation: In the Navcam image of Sept 19, near the borders of the four partial images, is a thin line which looks as if the comet could start cracking in two pieces. Could you please comment how do you interpret this line? Thanks!
    J. Issakainen, Biologist, Finland

    • emily says:

      Hi Jouni, please write your comments and questions on the relevant post, thanks!

  • emily says:

    For those who enquired previously about 3D models, happy to report you can download the files in today’s blog post: http://blogs.esa.int/rosetta/2014/10/03/measuring-comet-67pc-g/

    • Niklas Edberg says:

      What is the scale of the 3D model and in what (Spice) coordinate system is it shown in?

  • Robin Sherman says:

    What has happened to the 15/10/2014 blog about the confirmation of the landing site J.

    • emily says:

      Hi Robin, the blog platform has been having some technical issues the last 24 hours, meaning there is a delay on comments getting through (and the apparent disappearance of blog posts too, it seems). I hope the situation is resolved soon so I can approve/reply to pending comments. Apologies for the inconvenience.

  • John says:

    Hello Emily, I am unable to post a comment on the “cometwatch focus on the neck” page or under any other topic, since the layout has been changed recently. Why would this be?

  • John says:

    Hello Emily, Is your comment posting facility working. Since yesterday I am unable to post a comment on any page

  • Rosso Ticino says:

    Rosetta’s Dream

    Tell me why I chase your shining hair
    Why I’ve come to find you in the sky
    During ten years of my Odyssey
    Into the deep and cold universe
    For one and single kiss

    Tell me that after my touch
    You’ll kindle the fire of Passion
    And you’ll show me your secrets

    Tell me that we have already met one time
    And our Love lasts since a billion years
    I’ve just returned on your source

    And now take me around the Sun
    While I’ll hold your burning mane
    Until I’ll come back to sleep
    And you’ll be my Dream


    Fribourg (CH), November 9th 2014

  • XV says:

    Hi Editors,
    I left a comment on http://blogs.esa.int/rosetta/2014/11/13/rosetta-operations-update/
    but it has not passed moderation yet and may not.

    My comment was requesting that you all write ONE blog.

    I expected to come the ESA website and find a single timeline blog with everyone contributing. I am having to search for information/pictures/news and it ALL SEEMS REALLY FRAGMENTED.

    Could you not just create a single beautiful blog?

    You have got this incredible source of information and the presentation is like, well like 1990.

    I do not really want to see pictures of some media presenter, I would like to see in depth mission information, graphics, news, pictures all in ONE feed that is time stamped.

    Is it just me, am I missing this blog because I have not found the link?

    If this does not exist please create it.

    Best regards,

  • XV says:


    Another quick comment, it is not clear which pictures are mock ups and which are real.

    i.e. I doubt that the picture at…. http://www.esa.int/images/Philae_touchdown.jpg
    is a real photograph unless you landed a camera on the comet before Philae landed.

    As a scientific organisation I would have thought distinguishing fact from fiction would be important.

    Best regards,

  • XV says:


    I guess what I am trying to say is that you do not seem to know what a blog is!

    The difference between a webpage and a blog…




  • Sebastian Tewes says:

    to Emily Baldwin thx for show on youtube, but to say it loud google hangout sucks. Bad picture, poor sound so if you arn’t native english understanding isn’t realy possible. The briefings at http://new.livestream.com/ESA/cometlanding are the positiv opposite of it.. Personly i like to know more scientific information and lesser twitter & facebook low budget info.

    thx sebastian

  • John Burns says:

    Even though it has no technical significance, before the batteries go down, please send her the following message:
    “Philae. You are a long, long way from home. But you are not alone. You have done a good job. We love you. Earth humanity.”

  • Akhil Kurup says:

    Hey guys.. great work!
    I was just wondering if it was possible to estimate the position of Philae by analyzing the image of it’s first landing site?
    (Philae has 3 landing pod’s if i am correct. The direction it might have gone off in would have a greater dip into the surface of the comet. Maybe by analyzing the image, an estimation could be made to locate the rough position of Philae.)

  • Thierry says:

    Hi Claudia,

    Following your idea, I prepared a photo montage showing 67P over Brussels, Belgium.
    If you want it, you can contact me by email or via my web site.
    Kind regards,

  • David says:

    Emily, great presentation yesterday, thanks and congratulations to all. One question I’d like to ask (probably for Stefan Ulamec):

    Given that Philae is in (mostly) shadow and may not get enough sun at the moment to restart soon, can you tell us more about the battery technologies used and whether they can survive being left discharged in sub-zero temperatures? If it takes a few months to get enough sun to warm and recharge them, will this be possible?

  • J Ermis says:

    Would you relay to the ESA/Rosetta team the following:

    Have you tried using the orbiting satalight above the rock to
    reflect sun light down to where you think the lander
    may be so the batteries might get some charge?

    J. Ermis

    • David says:

      @J Ermis…. there are a lot of reasons why they can’t do this…
      – they don’t know exactly where Philae is
      – solar panels are not very reflective
      – orbital mechanics is not that simple….
      – the closest they would get to Philae is about 5 km or so and even that would be dangerous (imagine trying to fly a quadcopter round your house with a delay of 1 hour between command and response, without video to show you where you are going…that’s what they are doing!)

  • Valdir Júnior says:

    I’m not a scientist somehow, I’m only a song producer from Brazil, I only understand sounds, but loving science…

    I think the sound of Rosetta’s comet is wrong, any sound with ultra-low frequency are same, the frequency was increased, but not enough.

    I fixed the sound and increased the frequency:
    https://copy.com/3gEJ9gKAUp1dC0km (1 seg here = 3 segs)
    This is the real (or almost real) sound, looks like a wind noise.
    The “tock-tock-tock” of the sound published, is the effect of ultra-low frequency and not the real sound.

    How can I prove it?
    Listen this:
    This is a melody (lead) of a song, when we give a ultra-low freq to it, It’s the same exact effect of the comet singing, and not the real sound of a lead, then this is not the real sound of comet…

  • russ says:

    Would it have been possible to put a high power laser on the orbiter Rosetta to charge the solar panels of the lander Philae should it land in the shade?
    I watched the excellent programme on BBC, thanks for a great watch. It’s got my mind buzzing with questions and ideas. Brilliant.

  • davew says:

    A question reall aimed at Prof. Altwegg in particular but open to futher discussion: It looks like the D-H ratio for 67P indicates Comets are NOT the source of Earth’s water but why therefore are Asteroids a better suspect ?

  • Rosa Bergés says:

    Hello!!! I’m really interested to know if there is any possibility to buy the Rosetta Mission Team sweatshirts o t-shirts. I couldn’t find this information in all your website neither in the ESA merchandising shop (http://www.esaofficialstore.com). Could you please help me?? Thanks in advance and congratulation for this brilliant blog!

  • Bill says:


    I’m having frequent problems with the reCAPTCHA verification system since the Thanksgiving Holiday. The image and verification widow are slow to load and I get error messages from Google.



    • emily says:

      Hi Bill, yes, we’ve noted there have been some problems and it has been investigated; hopefully things are now working as they should…

  • Bill Harris says:

    reCAPTCHA is still problematic, but at least has gone intermittently so.

  • Moa Brunngård says:

    Hi, I’m doing a project in school where I need to know the distance between Rosetta and the Earth and Mars when it passes them to get more speed by using gravity assist.
    I have found these distance:
    – Mars (25 February 2007): 250 km
    – Earth (4 March 2005): 1995 km
    – Earth (13 November 2007): 5301 km
    – Earth (13 November 2009): 2500 km
    and I wonder they are correct.
    Thanks for any answer!

  • emily says:

    Dear Moa,
    Great to hear you are doing a school project on Rosetta!
    For the Rosetta-Earth distances you can check on our interactive tool: http://sci.esa.int/where_is_rosetta/ (which also has distances to the Sun).
    To check the Mars flyby distance, I looked up the news article from the time of the flyby, which has the answer: http://www.esa.int/About_Us/ESOC/Timeline_Mars_swingby_at_36_000_km_hr
    Best wishes!

  • Christian Schwarze says:


    Several Months ago the Rosetta-Team has released Soundfiles of the “Singing Comet” and the “Sound” Philae created at its Landing.

    Are there any such Soundfiles available from the Flybys of Asteroids Steins or Lutetia, too?

    Many Greetings!

    Christian Schwarze

  • I have processed NAV cam data that i wish to call your attention to . may I send you the data products directly

    • Claudia says:

      Dear Ignacio,
      Thanks for your enthusiasm!
      Feel free to post links to your NAVCAM processed images as comments below the relevant posts on this blog.
      Best wishes

Comments are closed.