Iau.org International Astronomical Union | IAU

Iau.org Overview

IAU.org is the official website of the International Astronomical Union, an organization that promotes and coordinates the study of astronomy worldwide. The website has a simple and clean design that allows users to easily navigate through its pages. The domain is a top-level domain, using the .ORG extension, which commonly designates non-profit organizations.

The website has been hosted by the European Southern Observatory since 2016, which means it is using reliable and secure hosting. The SSL certificate is issued by the Verein zur Foerderung eines Deutschen Forschungsnetzes e. V., ensuring that the website meets the security standards required for online transactions and data protection.

According to the latest web analytics, IAU.org attracts an average of 1728 unique users per day, with 3110.4 pageviews per daily visit. The site's estimated value is around 59130 US dollars. These numbers demonstrate the substantial influence the website has within the astronomical community worldwide.

The website's homepage highlights important news and events in the field of astronomy, as well as features links to various publications, resources, and programs administered by IAU. The top menu contains links to information about the organization, its structure, and its goals. There are also links to resources for researchers and educators, as well as a section dedicated to the public.

The user-friendly features of the site make it easy for anyone interested in the field of astronomy to learn more about it. The website also provides resources for students and educators, including projects, initiatives, and free online educational tools. There are links to resources for reaching the broader public, such as educational articles, science museums, and public lectures.

Overall, IAU.org is a family-friendly website that provides engaging and educational content about astronomy. The website is easy to navigate and offers resources for researchers, educators, and the general public. Despite scoring 66 on PageSpeed Insights, the website loads quickly and efficiently, ensuring that users can easily access the site's valuable content.

Iau.org Rank Summary

Global Rank

219,401

Average Load Time

3.97sec

Links In Count

1,967

Website Value

$59,130

Audience Geography. Where are iau.org visitors located?

Country	Visitors
United States US	30.5%
India IN	13.1%
Greece GR	7.6%
Iran IR	5.4%
Russian Federation RU	1%
Other	42.1%

Country	Pageviews
United States US	23.4%
India IN	12%
Greece GR	5.4%
Iran IR	5.4%
Russian Federation RU	1.1%
Other	52.6%

Country	Rank
Greece GR	25500
Iran IR	77031
India IN	93568
United States US	129772
Russian Federation RU	420911

Where do visitors go on iau.org?

Subdomain	Pageviews
iau.org	89.76%
100exhibit.iau.org	4.04%
astroedu.iau.org	3.43%
other	2.82%

Subdomain	Pageviews per User
iau.org	1.8
astroedu.iau.org	1
100exhibit.iau.org	1

Subdomain	Reach
iau.org	86.67%
100exhibit.iau.org	6.76%
astroedu.iau.org	5.07%

How popular is iau.org?

Period	Global Rank	Global Rank Delta
past 3 months	219401	27972
past month	235449	26105
past week	248987	36564
yesterday	226702	-195329

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	295997	38936	14	-15.58%	1.8	-2.23%
30	325889	50943	12	-20.92%	1.7	-10.05%
7	364024	72207	11	-31.01%	2	-15.47%
1	350355	-228370	1	100%	1	5%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	203279	25666	29	-13.89%
30	217054	18555	26	-11.69%
7	226764	26786	24	-18.22%
1	186904	-149819	3	100%

Iau.org Website Safety

Overview

Last Updated: 05/18/2025

Overall result - iau.org is safe.

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Last Updated: 03/25/2025

iau.org is safe.

Norton ConnectSafe evaluates iau.org for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 11/15/2016

iau.org is safe.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/09/2019

iau.org is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

Site Advisor

Last Updated: 02/23/2021

iau.org is safe.

McAfee assesses iau.org for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze iau.org for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/10/2019

iau.org child safety is very good.

The WOT calculates reputation of the iau.org. This reputation system receives ratings from users and information from third-party sources, assesses the iau.org for safety features and confirms, whether iau.org is suitable for children.

SSL Information

SSL Checker Tool

Domain	www.iau.org
Issuer Organization	GEANT Vereniging
Issuer	GEANT OV RSA CA 4
Algorithm	RSA-SHA384
Valid form	01/15/2024
Expiration	01/14/2025
Signed	Certificate is not self signed
Additional Domains	www.iau.org cps.iau.org cpsi.iau.org iau.hq.eso.org iau.org iaui.hq.eso.org wwwi.iau.org

Iau.org Rank History

Alexa Rank shows how popular iau.org is in comparison with other sites. The most popular site has Alexa Rank equals 1. If iau.org has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to iau.org and pageviews on iau.org over the past 3 months.

Iau.org Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 13335

ASN Title: CLOUDFLARENET - Cloudflare, Inc., US

Last Update: 04/22/2025

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

ASNumber: 13335
ASName: CLOUDFLARENET
ASHandle: AS13335
RegDate: 2010-07-14
Updated: 2017-02-17
Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Ref: https://rdap.arin.net/registry/autnum/13335

OrgName: Cloudflare, Inc.
OrgId: CLOUD14
Address: 101 Townsend Street
City: San Francisco
StateProv: CA
PostalCode: 94107
Country: US
RegDate: 2010-07-09
Updated: 2017-02-17
Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Ref: https://rdap.arin.net/registry/entity/CLOUD14

OrgTechHandle: ADMIN2521-ARIN
OrgTechName: Admin
OrgTechPhone: +1-650-319-8930
OrgTechEmail: rir@cloudflare.com
OrgTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

OrgAbuseHandle: ABUSE2916-ARIN
OrgAbuseName: Abuse
OrgAbusePhone: +1-650-319-8930
OrgAbuseEmail: abuse@cloudflare.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

OrgNOCHandle: NOC11962-ARIN
OrgNOCName: NOC
OrgNOCPhone: +1-650-319-8930
OrgNOCEmail: noc@cloudflare.com
OrgNOCRef: https://rdap.arin.net/registry/entity/NOC11962-ARIN

RNOCHandle: NOC11962-ARIN
RNOCName: NOC
RNOCPhone: +1-650-319-8930
RNOCEmail: noc@cloudflare.com
RNOCRef: https://rdap.arin.net/registry/entity/NOC11962-ARIN

RTechHandle: ADMIN2521-ARIN
RTechName: Admin
RTechPhone: +1-650-319-8930
RTechEmail: rir@cloudflare.com
RTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

RAbuseHandle: ABUSE2916-ARIN
RAbuseName: Abuse
RAbusePhone: +1-650-319-8930
RAbuseEmail: abuse@cloudflare.com
RAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

Iau.org Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

Domain Name: iau.org
Registry Domain ID: 53485c3b97914a6daa5b7943a14e709b-LROR
Registrar WHOIS Server: http://whois.rrpproxy.net
Registrar URL: http://www.key-systems.net
Updated Date: 2024-06-10T04:00:57Z
Creation Date: 1998-04-27T04:00:00Z
Registry Expiry Date: 2025-04-26T04:00:00Z
Registrar: Key-Systems GmbH
Registrar IANA ID: 269
Registrar Abuse Contact Email: abuse@key-systems.net
Registrar Abuse Contact Phone: +49.68949396850
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: ESO - European Southern Observatory
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: Bavaria
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: DE
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
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Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: niven.sc.eso.org
Name Server: orwell.hq.eso.org
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-10-11T10:18:34Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL
iau.org	134.171.75.33	3600

Host	MX Record	Priority	TTL
iau.org	hqmgw2.hq.eso.org	10	300
iau.org	hqmgw1.hq.eso.org	10	300

Host	NS Record	TTL
iau.org	hq-000-ns06.hq.eso.org	86400
iau.org	niven.sc.eso.org	86400
iau.org	orwell.hq.eso.org	86400
iau.org	leguin.sc.eso.org	86400

Host	TXT Record	TTL

verne.hq.eso.org
TTL: 3600
Email address: hostmaster.iau.org
Serial: 2019060508
Refresh: 3600
Retry: 1800
Expire: 604800
Minimum: 86400

Iau.org HTML Check

HTML Validation Tool

Errors

Bad value “/administration/events/past/?search="Communicating+Astronomy+with+the+Public"” for attribute “href” on element “a”: Illegal character in query: “"” is not allowed.

“"” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Warnings

The “form” role is unnecessary for element “form”.

The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

Iau.org Desktop Performance

Last tested: 12/09/2018

Desktop Speed

62%

Optimize images

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Leverage browser caching

Minify HTML

Desktop Resource Breakdown

Total Resources	58
Number of Hosts	10
Static Resources	48
JavaScript Resources	9
CSS Resources	1

Iau.org Mobile Insights

Last tested: 12/09/2018

Mobile Usability

94%

Size content to viewport

Size tap targets appropriately

Mobile Speed

66%

Optimize images

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Leverage browser caching

Minify HTML

Mobile Resource Breakdown

Total Resources	58
Number of Hosts	10
Static Resources	48
JavaScript Resources	9
CSS Resources	1

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Iau.org International Astronomical Union | IAU

Iau.org Overview

Iau.org Rank Summary

Iau.org Website Safety

Iau.org Rank History

Iau.org Hosting Information

Iau.org Domain Registration and Settings

Iau.org HTML Check

Iau.org Desktop Performance

Iau.org Mobile Insights

Iau.org Similar Audits

Iau.org Common Typos