Safety, Risk and Control Measures Policy

Version 1.0
Date: 14 July 2026

1 Why this policy matters

Astronomy and astrophotography are enjoyable, educational and rewarding hobbies. They are generally low risk activities, but you often work outdoors, in darkness, sometimes in remote places, with valuable and specialised optical equipment. This policy describes the main risks and the measures you should take to keep every observing session safe for you, for the people around you and for your equipment.

Please read this policy before you use new astronomical equipment for the first time and before you head out for an observing or imaging session. Our Terms and Conditions require you to read and follow the safety guidelines and manuals that come with your products and the safety information we make available online. This policy is part of that safety information.

2 General principles

• Read the manual of every product before first use and follow the instructions of the manufacturer.
• Always supervise children and inexperienced users when they use astronomical equipment.
• Prepare every session. Check the location, the weather and your equipment in advance.
• When in doubt about the safe use of a product, contact us before you use it.

3 Trips, slips and falls

Observing sites often have uneven ground, hidden holes, rocks, roots, ditches or animal burrows. Tripods and cables create obstacles, visibility is reduced at night, and grass, mud, frost, ice or snow can be slippery. A fall can cause sprains, fractures, cuts, bruises, head injuries and damage to your equipment.

How to stay safe.

• Survey the observing area before dark.
• Use a red light torch. It preserves your night vision while you can still see where you walk.
• Mark tripod legs with reflective tape.
• Keep cables organised and secured.
• Wear suitable footwear with good grip.
• Do not run or move quickly in darkness.

4 Solar observation and eye safety

The risk is extreme if solar safety measures are not followed. Looking at the Sun through a telescope without proper solar filtering can cause permanent retinal burns and partial or complete blindness within seconds. Damaged, incorrect or badly fitted solar filters are just as dangerous as no filter at all.

How to stay safe.

• Never look at the sun through a telescope unless it is specifically designed or properly equipped for solar observation.
• Use only certified solar filters, fitted securely over the front opening of the telescope.
• Inspect solar filters before every session for scratches, pinholes, tears or other damage.
• Never use solar filters that screw into the eyepiece. They can fail catastrophically because of concentrated heat.
• Keep finder scopes covered or fitted with approved solar filters.
• Never let children or inexperienced users operate solar observing equipment without direct supervision.
• Make sure everyone present understands the risks before solar observation starts.

Equipment that is generally safe for solar observation, when used according to the instructions of the manufacturer.

• Dedicated solar telescopes, including hydrogen alpha solar (Hα) telescopes. These are specifically designed for observing the Sun and allow safe observation of prominences, filaments, sunspots, flares and surface detail.
• White light solar filters that cover the full front opening of the telescope. These allow safe observation of sunspots and other features of the solar surface.
• Herschel wedges, but only with refracting telescopes (lens telescopes). Never use a Herschel wedge with a reflecting telescope or with a telescope that combines mirrors and lenses, unless the manufacturer specifically approves it. Always use the neutral density and other safety filters specified by the maker of the Herschel wedge.

5 Eye strain and comfortable observing

Long observing sessions and repeated viewing through eyepieces can cause temporary eye fatigue, glare, reduced dark adaptation, headaches and neck strain.

The Full Moon can appear extremely bright through larger telescopes, especially when your eyes are adapted to the dark. Observing the Moon is generally considered safe and is not known to cause permanent damage, but it can be uncomfortable and can temporarily affect your night vision.

How to stay safe.

• Take regular breaks.
• Use a comfortable observing chair.
• Alternate your observing eye where appropriate.
• Adjust the eyepiece focus carefully.
• For the Moon, use a lunar filter or a neutral density filter if you wish, reduce the opening of the telescope where possible, and limit the observation time if you feel discomfort.

6 Lifting and carrying equipment

Telescope tubes, equatorial mounts, counterweights, batteries and power stations can be heavy. Careless lifting can cause back injuries, muscle strains and crushed fingers or toes.

How to stay safe.

• Use proper lifting techniques.
• Ask for help with heavy equipment.
• Use wheeled transport cases where practical.
• Wear suitable footwear when handling heavy components.

7 Weather

Cold nights, hot days during solar observing, high winds, rain and thunderstorms all bring risks, from hypothermia, heat exhaustion and dehydration to damage to your equipment and a higher risk of slips and falls. High winds also shake telescopes and mounts, disturb long exposure astrophotography and can knock equipment over. Rain, clouds and thunderstorms make optical observation pointless and add needless risk.

How to stay safe.

• Check the weather forecast before travelling to an observing site.
• Keep an eye on the conditions during the whole session.
• Stop observing and pack away your equipment when rain, thunderstorms, lightning or high winds develop.
• Dress for the expected temperatures and bring enough food, water and warm clothing.
• Avoid exposed locations when thunderstorms are forecast or developing.

8 Remote locations

Isolated observing sites can mean limited mobile phone coverage, wildlife encounters and unfamiliar terrain. If something goes wrong, help can be far away.

How to stay safe.

• Tell someone where you are going and when you expect to be back.
• Carry a charged mobile phone and a backup power source.
• Use GPS or mapping tools.
• Observe together with others where possible.

9 Driving and fatigue

Driving long distances home after a late observing session brings a real risk of accidents through fatigue and poor visibility on rural roads.

How to stay safe.

• Do not drive when you are excessively tired.
• Take breaks during long journeys.
• Consider staying overnight when necessary.

10 Batteries and power systems

Modern astronomical equipment often runs on battery power, for example GoTo mounts, tracking systems, cooled astronomy cameras, dew heaters, mini computers, USB hubs and portable power stations. Damaged batteries, cables, connectors or chargers, incorrect voltage, short circuits, overheating and exposure to dew or rain can lead to equipment damage, electrical fires, burns, electric shock, sudden loss of power and trip hazards.

The risk is low to moderate when the equipment is properly maintained and operated. It becomes high when damaged batteries or incorrect power systems are used.

How to stay safe.

• Use only batteries, chargers and power supplies recommended by the manufacturer of your equipment.
• Check voltage and polarity before you connect anything.
• Inspect batteries, cables and connectors regularly and replace damaged components immediately.
• Protect batteries from impact, puncture, excessive heat and water.
• Leave enough ventilation around batteries and power stations.
• Route and secure cables so nobody trips over them.
• Do not overload power distribution systems.
• Disconnect equipment safely before transport and store batteries as the manufacturer recommends.

Emergency actions. If a battery overheats, smokes or catches fire, act as follows.

• Disconnect the power if it is safe to do so.
• Move everyone away from the area.
• Call the emergency services if necessary.
• Do not handle damaged or burning batteries unless you are trained and equipped for it.
• Follow the guidance of the manufacturer for damaged lithium batteries.

11 Laser pointers

Green laser pointers are often used in astronomy to point out stars, constellations and planets, and they can be valuable at public observing events. They are also potentially hazardous devices. A laser beam in the eyes can cause temporary visual impairment or eye injury. Pointing a laser at a driver or an aircraft can cause accidents and can lead to criminal prosecution and civil liability. The risk is moderate, and high where aircraft, vehicles or members of the public are involved.

Take particular care near airports, airfields, flight paths, roads, residential areas and public spaces.

How to stay safe.

• Only use laser pointers that comply with the laws and regulations that apply where you observe.
• Never deliberately point a laser at a person, an animal, a vehicle, a building or an aircraft.
• Check the sky for aircraft before you switch the laser on, and switch it off immediately when an aircraft approaches.
• Keep laser use as short as necessary.
• Store lasers securely when not in use.
• Let children and inexperienced users handle a laser only under direct supervision.
• At public events, appoint one responsible person to operate the laser.
• Choose another way to point out objects in the sky if public safety cannot be assured.

Emergency actions. If a laser accidentally hits an eye, act as follows.

• Stop using the laser immediately.
• Check whether visual disturbances persist.
• Seek medical attention if symptoms such as pain, blurred vision, blind spots or visual distortions occur.

If a laser is accidentally directed at an aircraft, act as follows.

• Stop using the laser immediately.
• Write down the details of the incident.
• Follow any local reporting requirements.

12 Your responsibility

This policy supports, but never replaces, the manuals and safety instructions of the manufacturers and the laws that apply where you observe. Always follow those first.

Our Terms and Conditions state that we are not liable for damage caused by using products in breach of the safety guidelines and manuals that come with them or of this policy. Using your equipment safely is in the first place in your own hands.

13 Questions

Questions about the safe use of a product? Contact us at info@nightskyoptics.eu before you use it.