AC 2021 Day 0 Briefing

Hi participants, Day 0 is here! The briefing has been uploaded on our website and sent to your emails. Please read it for information on what to have for Day 1, how to use Zoom, and the competition format.

You are reminded to download Zoom on two devices and ensure your teammates/schoolmates are in this channel as well as a group with an AC comm member.

Thank you and we look forward to your participation on Day 1 and 2!

AC 2021 Information Letter

Hello all,

the information letter for AC 2021 has been uploaded. You can find it in the Information Resources tab, or through this link.

AstroChallenge 2021

Dear all,

We would like to cordially invite you to participate in AstroChallenge 2021.  This year’s AstroChallenge 2021 will be held on 29th May, 7th June, 8th June and 12th June 2020. Registration can be performed at this link. Please register under “Junior” if either you are a secondary school or if you are enrolled in the first 4 years of an IP/IB school. If you are enrolled in a Junior College, Polytechnic or the last 2 years of an IP/IB school, please register under “Senior”.

With this, we are proud to present to you the list of format changes for AstroChallenge 2021.

We are also delighted to present to you the 20 questions and important information (including the submission format and rubrics) regarding the Project Round. They are in the Project Round Infosheet.

If you have any query with regards to AstroChallenge 2021, kindly direct them to Furthermore, do keep a lookout on our Facebook page for more updates on information pertaining to AC2021.

AC 2021 Organizing Committee

AC2020 Administrative Details

Dear Teachers in Charge and Schools Astronomy Clubs,

This post marks the official launch of AstroChallenge 2020! As mentioned in the Updated Information Letter, the AstroChallenge 2020 Organising Committee has prepared briefing materials for different components of AstroChallenge 2020:

AC2020 Administrative Guide For Participants

This guide contains important administrative details for AstroChallenge 2020. It reiterates key information from both the Invitation Letter and Updated Information Letter, as well as details of how AC2020 will be conducted online for the first time. Brief description of what to expect for each component and submissions guidelines can also be found in this guide. Participants can also find a summary of key submissions to be made before Day 1.

AC2020 Content Guide For Participants

This guide contains key format changes from past years AstroChallenge, general tips and resources for AstroChallenge 2020.

AC2020 Observation Round Materials

This zip file contains a briefing of the details of Observation Round for AC2020, Night Sky Tour question (new component) and guidelines. An URL to the video briefing of Observation Round can also be found. Do note that as AC2020 will be conducted online, the physical AC components briefed in the video will be irrelevant.

AC2020 Updated Project Round Infosheet

The updated project round infosheet has already been released previously together with the updated information letter. It contains the updated information of Project Round.

AC2020 Data Analysis Question (For Seniors)

The DAQ is a new component in Seniors Teams Round. The question has already been released.

Telegram Guide & Zoom Guide

Telegram will be used as a main communication platform besides email for AC2020. Information on how the platform is utilised for AC2020 is detailed in AC2020 Administrative Guide. The Telegram Guide contains information of installation and joining of AstroChallenge 2020 Main Channel and groups. All participants are required to join AstroChallenge 2020 Main Channel to receive key updates before and during the competition. Link to the Channel can be found here:

Zoom will be used as the main competition platform for AC2020. Information on how the platform is utilised for AC2020 is detailed in AC2020 Administrative Guide. The Zoom Guide contains information of installation and joining of the competition meeting room on Day 1 and 2. All participants are highly encouraged to familiarise themselves with the information provided to facilitate smooth execution of Day 1 and 2.

We understand that these changes can be confusing and drastic. Should you have any query regarding any of details in the guides or AC2020 in general, please feel free to direct them to We will try to get back to you as fast as we can!

We wish you Clear Skies ahead and look forward to your participation in AstroChallenge 2020 Day 1 and Day 2!

Thank you and Best Regards,

AstroChallenge 2020 Organizing Committee

Astrochallenge 2020 Announcements

Dear All,

We apologize for the long wait you have to endure for us to come up with the updated Information letterand Project Round Infosheet. There were many logistical changes we have to make due to the ongoing COVID-19 pandemic.

In view of the situation, AstroChallenge 2020 will be held online on 5thSeptember, 5thDecember and 9thDecember 2020. Due to the change in format of AstroChallenge 2020, we have adjusted several components of AstroChallenge this year.

We would kindly implore you to read the updated Information Letter and Project Round Infosheet closely.

We would like to take this opportunity to announce that registration for AstroChallenge 2020 is reopened and the deadline is 3rdDecember 2020.

As usual, if you should have any queries, feel free to email us. We will get back to you as soon as we can.

We wish you Clear Skies ahead and thank you for your support for AstroChallenge!


The Astrochallenge Organizing Team of 2020

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